diff --git a/db/blockly_unix_database.db b/db/blockly_unix_database.db
index be29e34..8ffd39b 100644
Binary files a/db/blockly_unix_database.db and b/db/blockly_unix_database.db differ
diff --git a/index.html b/index.html
index 152ce6b..3ddb65d 100644
--- a/index.html
+++ b/index.html
@@ -19,6 +19,9 @@
 
     <!-- BLOCKS DEFINITION -->
     <script src="blocks/psBlock.js"></script>
+    <script src="blocks/argumentsCreateBlock.js"></script>
+    <script src="blocks/argumentBlock.js"></script>
+    <script src="blocks/regBackreferenceBlock.js"></script>
     <script src="blocks/dfBlock.js"></script>
     <script src="blocks/killBlock.js"></script>
     <script src="blocks/chmodBlock.js"></script>
@@ -58,9 +61,7 @@
     <script src="blocks/catBlock.js"></script>
     <script src="blocks/saveBlock.js"></script>
     <script src="blocks/appendBlock.js"></script>
-    <script src="blocks/regOutputBlock.js"></script>
     <script src="blocks/regPatternBlock.js"></script>
-    <script src="blocks/regOrBlock.js"></script>
     <script src="blocks/regCapturingGroupBlock.js"></script>
     <script src="blocks/regStartBlock.js"></script>
     <script src="blocks/regEndBlock.js"></script>
@@ -77,7 +78,6 @@
     <script src="blocks/fileEndStartBlock.js"></script>
     <script src="blocks/echoBlock.js"></script>
     <script src="blocks/findBlock.js"></script>
-    <script src="blocks/regLookaheadBlock.js"></script>
     <script src="blocks/regCommonBlock.js"></script>
     <script src="blocks/touchBlock.js"></script>
     <script src="blocks/NRBlock.js"></script>
@@ -239,7 +239,7 @@
           colourSecondary: '#FFCDD2',
           colourTertiary: '#CDB6E9'
         },
-        'File inputs': {
+        'Function inputs': {
           colourPrimary: '#5C81A6',
           colourSecondary: '#ff0000',
           colourTertiary: '#C5EAFF'
@@ -352,12 +352,14 @@
           },
           {
             kind: 'category',
-            name: [MSG.FILE_INPUTS],
+            name: [MSG.FUCTION_INPUTS],
             colour: '#5C81A6',
             contents: [
               { kind: 'block', type: 'filename' },
               { kind: 'block', type: 'filenamesCreate' },
-              { kind: 'block', type: 'fileEndStart' }
+              { kind: 'block', type: 'fileEndStart' },
+              { kind: 'block', type: 'argument' },
+              { kind: 'block', type: 'argumentsCreate' }
             ]
           },
           {
@@ -373,6 +375,7 @@
               { kind: 'block', type: 'mv' },
               { kind: 'block', type: 'rm' },
               { kind: 'block', type: 'ls' },
+              { kind: 'block', type: 'cd' },
               { kind: 'block', type: 'find' },
               { kind: 'block', type: 'mkdir' }
             ]
@@ -399,13 +402,14 @@
             colour: '#FF5733',
             contents: [
               { kind: 'block', type: 'regPattern' },
-              { kind: 'block', type: 'regOr' },
-              { kind: 'block', type: 'regCapturingGroup' },
-              { kind: 'block', type: 'regStart' },
-              { kind: 'block', type: 'regEnd' },
               { kind: 'block', type: 'regFor' },
               { kind: 'block', type: 'regRange' },
+              { kind: 'block', type: 'regStart' },
+              { kind: 'block', type: 'regEnd' },
               { kind: 'block', type: 'regAnyOne' },
+              { kind: 'block', type: 'regCapturingGroup' },
+              { kind: 'block', type: 'regAlternation' },
+              { kind: 'block', type: 'regBackreference' },
               { kind: 'block', type: 'regCommon' }
             ]
           },
diff --git a/public/blocks/argumentBlock.js b/public/blocks/argumentBlock.js
new file mode 100644
index 0000000..2e926e1
--- /dev/null
+++ b/public/blocks/argumentBlock.js
@@ -0,0 +1,19 @@
+var argumentBlock = {
+  type: 'argument',
+  category: 'Function inputs',
+  message0: '%{BKY_ARGUMENT} %1',
+  args0: [
+    {
+      type: 'field_input',
+      name: 'argument',
+      text: 'argument' // default text for the input
+    }
+  ],
+
+  output: 'String',
+  style: 'Function inputs',
+  tooltip: '%{BKY_ARGUMENT_TOOLTIP}',
+  helpUrl: '%{BKY_ARGUMENT_HELPURL}' // URL για περαιτέρω πληροφορίες ή τεκμηρίωση.
+};
+
+Blockly.defineBlocksWithJsonArray([argumentBlock]);
diff --git a/public/blocks/regOrBlock.js b/public/blocks/argumentsCreateBlock.js
similarity index 79%
rename from public/blocks/regOrBlock.js
rename to public/blocks/argumentsCreateBlock.js
index 8efca2a..f29d4b5 100644
--- a/public/blocks/regOrBlock.js
+++ b/public/blocks/argumentsCreateBlock.js
@@ -1,7 +1,7 @@
-var regOrBlock = {
-  type: 'regOr',
-  category: 'Regular Expressions',
-  message0: '%{BKY_REGOR_CREATE_WITH} %1',
+var argumentsCreateBlock = {
+  type: 'argumentsCreate',
+  category: 'Function inputs',
+  message0: '%{BKY_ARGUMENTS_CREATE_WITH} %1',
   args0: [
     {
       type: 'input_dummy',
@@ -9,15 +9,15 @@ var regOrBlock = {
     }
   ],
   output: 'String',
-  style: 'Regular Expressions',
-  helpUrl: '%{BKY_REGOR_CREATE_WITH_HELPURL}',
-  tooltip: '%{BKY_REGOR_CREATE_WITH_TOOLTIP}',
-  mutator: 'new_list_create_with_mutator_OrRegex'
+  style: 'Function inputs',
+  helpUrl: '%{BKY_ARGUMENTS_CREATE_WITH_HELPURL}',
+  tooltip: '%{BKY_ARGUMENTS_CREATE_WITH_TOOLTIP}',
+  mutator: 'new_list_create_with_mutator_Arguments'
 };
 
-Blockly.defineBlocksWithJsonArray([regOrBlock]);
+Blockly.defineBlocksWithJsonArray([argumentsCreateBlock]);
 
-const listCreateMutator_OrRegex = {
+const listCreateMutator_Arguments = {
   /**
    * Number of item inputs the block has.
    * @type {number}
@@ -25,7 +25,7 @@ const listCreateMutator_OrRegex = {
   itemCount_: 0,
 
   /**
-   * Creates XML to represent number of text inputs.
+   * Creates XML to represent number of argument inputs.
    * @returns {!Element} XML storage element.
    * @this {Blockly.Block}
    */
@@ -35,7 +35,7 @@ const listCreateMutator_OrRegex = {
     return container;
   },
   /**
-   * Parses XML to restore the text inputs.
+   * Parses XML to restore the argument inputs.
    * @param {!Element} xmlElement XML storage element.
    * @this {Blockly.Block}
    */
@@ -99,10 +99,6 @@ const listCreateMutator_OrRegex = {
     this.updateMinus_();
   },
 
-  // To properly keep track of indices we have to increment before/after adding
-  // the inputs, and decrement the opposite.
-  // Because we want our first input to be ADD0 (not ADD1) we increment after.
-
   /**
    * Adds an input to the end of the block. If the block currently has no
    * inputs it updates the top 'EMPTY' input to receive a block.
@@ -114,7 +110,7 @@ const listCreateMutator_OrRegex = {
       this.removeInput('EMPTY');
       this.topInput_ = this.appendValueInput('ADD' + this.itemCount_)
         .appendField(createPlusField(), 'PLUS')
-        .appendField(Blockly.Msg['REGOR_CREATE_WITH']);
+        .appendField(Blockly.Msg['ARGUMENTS_CREATE_WITH']);
     } else {
       this.appendValueInput('ADD' + this.itemCount_);
     }
@@ -133,7 +129,7 @@ const listCreateMutator_OrRegex = {
     if (this.itemCount_ == 0) {
       this.topInput_ = this.appendDummyInput('EMPTY')
         .appendField(createPlusField(), 'PLUS')
-        .appendField(Blockly.Msg['REGOR_CREATE_EMPTY_TITLE']);
+        .appendField(Blockly.Msg['ARGUMENTS_CREATE_EMPTY_TITLE']);
     }
   },
 
@@ -155,13 +151,13 @@ const listCreateMutator_OrRegex = {
  * Updates the shape of the block to have 3 inputs if no mutation is provided.
  * @this {Blockly.Block}
  */
-const listCreateHelper_OrRegex = function () {
+const listCreateHelper_Arguments = function () {
   this.getInput('EMPTY').insertFieldAt(0, createPlusField(), 'PLUS');
   this.updateShape_(2);
 };
 
 Blockly.Extensions.registerMutator(
-  'new_list_create_with_mutator_OrRegex',
-  listCreateMutator_OrRegex,
-  listCreateHelper_OrRegex
+  'new_list_create_with_mutator_Arguments',
+  listCreateMutator_Arguments,
+  listCreateHelper_Arguments
 );
diff --git a/public/blocks/cdBlock.js b/public/blocks/cdBlock.js
index 8089450..6fff870 100644
--- a/public/blocks/cdBlock.js
+++ b/public/blocks/cdBlock.js
@@ -1,23 +1,18 @@
 var cdBlock = {
   type: 'cd',
   category: 'Filesystem Operations',
-  unix_description: [
-    {
-      directory: './str'
-    }
-  ],
+  unix_description: [{}],
   message0: '%{BKY_CD} %1',
   args0: [
     {
       type: 'field_input',
       name: 'directory',
-      text: '' // αρχικό κενό text για να ορίσει ο χρήστης το path
+      text: '............' // empty text for user to define path
     }
   ],
-  style: 'File and Directory Operations',
+  style: 'Filesystem Operations',
   tooltip: '%{BKY_CD_TOOLTIP}',
-  helpUrl: '%{BKY_CD_HELPURL}' // Σύνδεσμος για περισσότερες πληροφορίες ή τεκμηρίωση.
+  helpUrl: '%{BKY_CD_HELPURL}' // URL to further information or documentation.
 };
 
-// Εισάγουμε το block στο Blockly
 Blockly.defineBlocksWithJsonArray([cdBlock]);
diff --git a/public/blocks/fileEndStartBlock.js b/public/blocks/fileEndStartBlock.js
index 0813377..8af4d3f 100644
--- a/public/blocks/fileEndStartBlock.js
+++ b/public/blocks/fileEndStartBlock.js
@@ -1,6 +1,6 @@
 var fileEndStartBlock = {
   type: 'fileEndStart',
-  category: 'File inputs',
+  category: 'Function inputs',
   unix_description: [
     {
       starts: 'str*',
@@ -26,7 +26,7 @@ var fileEndStartBlock = {
   ],
 
   output: 'fileWildcard',
-  style: 'File inputs',
+  style: 'Function inputs',
   tooltip: '%{BKY_FILE_END_START_WILDCHARS_TOOLTIP}',
   helpUrl: '%{BKY_FILE_END_START_WILDCHARS_HELPURL} ' // URL to further information or documentation.
 };
diff --git a/public/blocks/filenameBlock.js b/public/blocks/filenameBlock.js
index 05fcc4a..4e0ff64 100644
--- a/public/blocks/filenameBlock.js
+++ b/public/blocks/filenameBlock.js
@@ -1,6 +1,6 @@
 var filenameBlock = {
   type: 'filename',
-  category: 'File inputs',
+  category: 'Function inputs',
   message0: '%{BKY_FILENAME} %1',
   args0: [
     {
@@ -10,7 +10,7 @@ var filenameBlock = {
     }
   ],
   output: 'filename',
-  style: 'File inputs',
+  style: 'Function inputs',
   tooltip: '%{BKY_FILENAME_TOOLTIP}',
   helpUrl: '%{BKY_FILENAME_HELPURL}' // URL to further information or documentation.
 };
diff --git a/public/blocks/filenamesCreateBlock.js b/public/blocks/filenamesCreateBlock.js
index 896465c..6674b97 100644
--- a/public/blocks/filenamesCreateBlock.js
+++ b/public/blocks/filenamesCreateBlock.js
@@ -1,6 +1,6 @@
 var filenamesCreateBlock = {
   type: 'filenamesCreate',
-  category: 'File inputs',
+  category: 'Function inputs',
   message0: '%{BKY_FILES_CREATE_WITH} %1',
   args0: [
     {
@@ -8,7 +8,7 @@ var filenamesCreateBlock = {
       name: 'EMPTY'
     }
   ],
-  style: 'File inputs',
+  style: 'Function inputs',
   nextStatement: 'Action',
   helpUrl: '%{BKY_FILES_CREATE_WITH_HELPURL}',
   tooltip: '%{BKY_FILES_CREATE_WITH_TOOLTIP}',
diff --git a/public/blocks/lnBlock.js b/public/blocks/lnBlock.js
index 86e1d9a..b8b6a2a 100644
--- a/public/blocks/lnBlock.js
+++ b/public/blocks/lnBlock.js
@@ -9,7 +9,8 @@ var lnBlock = {
       force: '-f',
       interactive: '-i',
       follow_symlink: '-L',
-      no_symlink_follow: '-P'
+      no_symlink_follow: '-P',
+      SOURCE: 'str'
     }
   ],
   message1: '%{BKY_LN_SYMBOLIC_LINK}',
@@ -39,14 +40,16 @@ var lnBlock = {
   message4: '%{BKY_LN_SOURCE}: %1 %{BKY_LN_TARGET}: %2',
   args4: [
     {
-      type: 'field_input',
+      type: 'input_value',
       name: 'SOURCE',
-      text: 'source' // default source
+      text: 'source', // default source
+      check: 'String'
     },
     {
-      type: 'field_input',
+      type: 'input_value',
       name: 'TARGET',
-      text: 'target' // default target
+      text: 'target', // default target
+      check: 'String'
     }
   ],
   style: 'Filesystem Operations',
diff --git a/public/blocks/regAlternationBlock.js b/public/blocks/regAlternationBlock.js
index 699af73..d977425 100644
--- a/public/blocks/regAlternationBlock.js
+++ b/public/blocks/regAlternationBlock.js
@@ -28,6 +28,7 @@ var regAlternationBlock = {
     }
   ],
   style: 'Regular Expressions',
+  output: 'String',
   previousStatement: null,
   nextStatement: null,
   tooltip:
diff --git a/public/blocks/regAnyOneBlock.js b/public/blocks/regAnyOneBlock.js
index f8b0113..87ba949 100644
--- a/public/blocks/regAnyOneBlock.js
+++ b/public/blocks/regAnyOneBlock.js
@@ -1,31 +1,32 @@
 var regAnyOneBlock = {
   type: 'regAnyOne',
+  category: 'Regular Expressions',
   unix_description: [
     {
       regPattern: '[patt]',
-      notMatch: 'patt^'
+      notMatch: '[^patt^]'
     }
   ],
-  category: 'Regular Expressions',
-  message0: '%{BKY_REGANYONE}',
+
+  message0: '%{BKY_REGANYONE} \n Not %2',
   args0: [
     {
-      type: 'input_value',
+      type: 'input_statement',
       name: 'regPattern',
       check: 'String'
-    }
-  ],
-  message1: '%{BKY_REGANYONE_NOT}',
-  args1: [
+    },
+
     {
       type: 'field_checkbox',
       name: 'notMatch',
       checked: false
     }
   ],
+
   tooltip: '%{BKY_REGANYONE_TOOLTIP}',
-  previousStatement: 'Action',
-  nextStatement: 'Action',
+  output: 'String',
+  previousStatement: null,
+  nextStatement: null,
   style: 'Regular Expressions',
   helpUrl: '%{BKY_REGANYONE_HELPURL}' // URL to further information or documentation.
 };
diff --git a/public/blocks/regBackreferenceBlock.js b/public/blocks/regBackreferenceBlock.js
new file mode 100644
index 0000000..f6ee591
--- /dev/null
+++ b/public/blocks/regBackreferenceBlock.js
@@ -0,0 +1,43 @@
+var regBackreferenceBlock = {
+  type: 'regBackreference',
+  category: 'Regular Expressions',
+  unix_description: [
+    {
+      1: '\\1',
+      2: '\\2',
+      3: '\\3',
+      4: '\\4',
+      5: '\\5',
+      6: '\\6',
+      7: '\\7',
+      8: '\\8',
+      9: '\\9'
+    }
+  ],
+  message0: 'Backreference to group %1',
+  args0: [
+    {
+      type: 'field_dropdown', // Dropdown για επιλογή του αριθμού αναφοράς
+      name: 'BACKREF_NUMBER',
+      options: [
+        ['1', '1'],
+        ['2', '2'],
+        ['3', '3'],
+        ['4', '4'],
+        ['5', '5'],
+        ['6', '6'],
+        ['7', '7'],
+        ['8', '8'],
+        ['9', '9']
+      ]
+    }
+  ],
+  style: 'Regular Expressions',
+  previousStatement: 'Action',
+  nextStatement: 'Action',
+  tooltip: 'References a previously matched group using \\1, \\2, etc.',
+  helpUrl:
+    'https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions#backreferences'
+};
+
+Blockly.defineBlocksWithJsonArray([regBackreferenceBlock]);
diff --git a/public/blocks/regCapturingGroupBlock.js b/public/blocks/regCapturingGroupBlock.js
index 6578e05..dedc7d7 100644
--- a/public/blocks/regCapturingGroupBlock.js
+++ b/public/blocks/regCapturingGroupBlock.js
@@ -2,7 +2,7 @@ var regCapturingGroupBlock = {
   type: 'regCapturingGroup',
   unix_description: [
     {
-      Group: '(patt)'
+      regPattern: '(patt)'
     }
   ],
   category: 'Regular Expressions',
@@ -10,11 +10,12 @@ var regCapturingGroupBlock = {
   args0: [
     {
       type: 'input_statement',
-      name: 'Group',
+      name: 'regPattern',
       check: 'String'
     }
   ],
   tooltip: '%{BKY_REGCAPTURINGGROUP_TOOLTIP}',
+  output: 'String',
   previousStatement: null,
   nextStatement: null,
   style: 'Regular Expressions',
diff --git a/public/blocks/regEndBlock.js b/public/blocks/regEndBlock.js
index d6960ea..3adffab 100644
--- a/public/blocks/regEndBlock.js
+++ b/public/blocks/regEndBlock.js
@@ -3,20 +3,12 @@ var regEndBlock = {
   category: 'Regular Expressions',
   unix_description: [
     {
-      regEnd: 'patt$'
+      regPattern: 'patt$'
     }
   ],
   message0: '%{BKY_REGEND}',
-  args0: [
-    {
-      type: 'input_value',
-      name: 'regPattern',
-      check: 'String'
-    }
-  ],
   style: 'Regular Expressions',
   previousStatement: 'Action',
-  nextStatement: 'Action',
   tooltip: '%{BKY_REGEND_TOOLTIP}',
   helpUrl: '%{BKY_REGEND_HELPURL}' // URL to further information or documentation.
 };
diff --git a/public/blocks/regForBlock.js b/public/blocks/regForBlock.js
index 390e8f0..499c4bd 100644
--- a/public/blocks/regForBlock.js
+++ b/public/blocks/regForBlock.js
@@ -24,13 +24,7 @@ var regForBlock = {
       checked: false
     }
   ],
-  message1: '%{BKY_REGFOR_1}',
-  args1: [
-    {
-      type: 'input_statement',
-      name: 'DO'
-    }
-  ],
+
   previousStatement: null,
   nextStatement: null,
   style: 'Regular Expressions',
diff --git a/public/blocks/regLookaheadBlock.js b/public/blocks/regLookaheadBlock.js
deleted file mode 100644
index 22ee017..0000000
--- a/public/blocks/regLookaheadBlock.js
+++ /dev/null
@@ -1,33 +0,0 @@
-var regLookaheadBlock = {
-  type: 'regLookahead',
-  category: 'Regular Expressions',
-  unix_description: [
-    {
-      positive: '(?= patt)',
-      negative: '(?! patt)'
-    }
-  ],
-  message0: '%{BKY_REGLOOKAHEAD}',
-  args0: [
-    {
-      type: 'field_dropdown',
-      name: 'reg_lookahead',
-      options: [
-        ['is', 'positive'],
-        ['is not', 'negative']
-      ]
-    },
-    {
-      type: 'input_value',
-      name: 'regPattern',
-      check: 'String'
-    }
-  ],
-  style: 'Regular Expressions',
-  previousStatement: 'Action',
-  nextStatement: 'Action',
-  tooltip: '%{BKY_REGLOOKAHEAD_TOOLTIP}',
-  helpUrl: '%{BKY_REGLOOKAHEAD_HELPURL}' // URL to further information or documentation.
-};
-
-Blockly.defineBlocksWithJsonArray([regLookaheadBlock]);
diff --git a/public/blocks/regOutputBlock.js b/public/blocks/regOutputBlock.js
deleted file mode 100644
index 79b18f8..0000000
--- a/public/blocks/regOutputBlock.js
+++ /dev/null
@@ -1,19 +0,0 @@
-var regOutputBlock = {
-  type: 'regOutput',
-  category: 'Regular Expressions',
-  message0: '%{BKY_REGOUTPUT}',
-  message1: '%{BKY_REGOUTPUT_1}',
-  args1: [
-    {
-      type: 'input_statement',
-      name: 'DO'
-    }
-  ],
-  output: 'String',
-  nextStatement: null,
-  style: 'Regular Expressions',
-  tooltip: '%{BKY_REGOUTPUT_TOOLTIP}',
-  helpUrl: '%{BKY_REGOUTPUT_HELPURL}' // URL to further information or documentation.
-};
-
-Blockly.defineBlocksWithJsonArray([regOutputBlock]);
diff --git a/public/blocks/regPatternBlock.js b/public/blocks/regPatternBlock.js
index c99b822..adb81af 100644
--- a/public/blocks/regPatternBlock.js
+++ b/public/blocks/regPatternBlock.js
@@ -1,25 +1,37 @@
+// Ορισμός του generator για τη γλώσσα JavaScript
+Blockly.JavaScript = new Blockly.Generator('JavaScript');
+var generator = Blockly.JavaScript;
+
+// Ορισμός του block regPattern
 var regPatternBlock = {
   type: 'regPattern',
   category: 'Regular Expressions',
+  message0: '%{BKY_REGPATTERN}',
   unix_description: [
     {
-      //?????????
+      regPattern: 'patt'
     }
   ],
-  message0: '%{BKY_REGPATTERN}',
   args0: [
     {
       type: 'field_input',
       name: 'regPattern',
-      text: 'type your pattern here...' // default text for the input
+      text: 'string' // default text for the input
     }
   ],
-  output: 'String',
-  style: 'Regular Expressions',
-  output: 'String',
+  previousStatement: 'Action',
   nextStatement: 'Action',
+  style: 'Regular Expressions',
   tooltip: '%{BKY_REGPATTERN_TOOLTIP}',
   helpUrl: '%{BKY_REGPATTERN_HELPURL}' // URL to further information or documentation.
 };
 
+// Ορισμός του block στο Blockly
 Blockly.defineBlocksWithJsonArray([regPatternBlock]);
+
+// Ορισμός του generator για το block regPattern
+generator.forBlock['regPattern'] = function (block) {
+  var text = block.getFieldValue('regPattern');
+  var code = `'${text}'`;
+  return [code, generator.ORDER_ATOMIC];
+};
diff --git a/public/blocks/regQuantBlock.js b/public/blocks/regQuantBlock.js
deleted file mode 100644
index acff71f..0000000
--- a/public/blocks/regQuantBlock.js
+++ /dev/null
@@ -1,41 +0,0 @@
-var regQuantBlock = {
-  type: 'regQuant',
-  category: 'Regular Expressions',
-  unix_description: [
-    {
-      zeroOne: 'patt?',
-      oneMore: 'patt+',
-      zeroMore: 'patt*',
-      anyCharExceptNewLine: '.'
-    }
-  ],
-  message0: '%{BKY_REGQUANT}',
-  message1: '%{BKY_REGQUANT_1}',
-  args1: [
-    {
-      type: 'field_dropdown',
-      name: 'reg_quant',
-      options: [
-        ['zero or one', 'zeroOne'],
-        ['one or more', 'oneMore'],
-        ['zero or more', 'zeroMore'],
-        ['any char except new line', 'anyCharExceptNewLine']
-      ]
-    }
-  ],
-  message2: '%{BKY_REGQUANT_PATTERN}',
-  args2: [
-    {
-      type: 'input_value',
-      name: 'regPattern',
-      check: 'String'
-    }
-  ],
-  style: 'Regular Expressions',
-  previousStatement: 'Action',
-  nextStatement: 'Action',
-  tooltip: '%{BKY_REGQUANT_TOOLTIP}',
-  extensions: ['integer_validation'],
-  helpUrl: '%{BKY_REGQUANT_HELPURL}' // URL to further information or documentation.
-};
-Blockly.defineBlocksWithJsonArray([regQuantBlock]);
diff --git a/public/blocks/regStartBlock.js b/public/blocks/regStartBlock.js
index 89105b4..d5dbab8 100644
--- a/public/blocks/regStartBlock.js
+++ b/public/blocks/regStartBlock.js
@@ -3,18 +3,12 @@ var regStartBlock = {
   category: 'Regular Expressions',
   unix_description: [
     {
-      regStart: '^'
+      regPattern: '^patt'
     }
   ],
   message0: '%{BKY_REGSTART}',
-  args0: [
-    {
-      type: 'input_value',
-      name: 'regPattern',
-      check: 'String'
-    }
-  ],
   style: 'Regular Expressions',
+  previousStatement: 'Action',
   nextStatement: 'Action',
   tooltip: '%{BKY_REGSTART_TOOLTIP}',
   helpUrl: '%{BKY_REGSTART_HELPURL}' // URL to further information or documentation.
diff --git a/public/blocks/sshBlock.js b/public/blocks/sshBlock.js
index c8c5f73..6e3fac6 100644
--- a/public/blocks/sshBlock.js
+++ b/public/blocks/sshBlock.js
@@ -4,15 +4,18 @@ var sshBlock = {
   category: 'Network Operations',
   unix_description: [
     {
-      command: 'ssh %USER@%HOST -p %PORT %COMMAND'
+      KEY: '-i str',
+      PORT: '-p str',
+      USER: 'str@',
+      HOST: 'str'
     }
   ],
-  message1: '%{BKY_SSH_HOST} %1',
+  message1: 'Private Key File %1',
   args1: [
     {
       type: 'field_input',
       name: 'KEY',
-      text: 'key'
+      text: '/path/to/key'
     }
   ],
   message2: '%{BKY_SSH_USER} %1',
@@ -23,8 +26,16 @@ var sshBlock = {
       text: 'user'
     }
   ],
-  message3: '%{BKY_SSH_PORT} %1',
+  message3: '%{BKY_SSH_HOST} %1',
   args3: [
+    {
+      type: 'field_input',
+      name: 'HOST',
+      text: 'host'
+    }
+  ],
+  message4: '%{BKY_SSH_PORT} %1',
+  args4: [
     {
       type: 'field_input',
       name: 'PORT',
@@ -34,7 +45,8 @@ var sshBlock = {
   style: 'Network Operations',
   previousStatement: 'Action',
   nextStatement: 'Action',
-  tooltip: 'Ανοίγει ασφαλείς συνδέσεις δικτύου.',
+  tooltip:
+    'Ανοίγει ασφαλείς συνδέσεις δικτύου με δυνατότητα καθορισμού private key.',
   helpUrl: 'https://linux.die.net/man/1/ssh'
 };
 
diff --git a/public/blocks/touchBlock.js b/public/blocks/touchBlock.js
index 550404a..bd77754 100644
--- a/public/blocks/touchBlock.js
+++ b/public/blocks/touchBlock.js
@@ -1,9 +1,10 @@
 var touchBlock = {
   type: 'touch',
-  message0: '%{BKY_TOUCH}',
+
   category: 'Filesystem Operations',
   unix_description: [
     {
+      argument: 'arg',
       not_create_file: '-c',
       change_time_t: '-t str',
       change_time_d: '-d str',
@@ -11,6 +12,14 @@ var touchBlock = {
       modification_time: '-m'
     }
   ],
+  message0: '%{BKY_TOUCH}',
+  args0: [
+    {
+      type: 'input_value',
+      name: 'argument',
+      check: 'String'
+    }
+  ],
   message1: '%{BKY_TOUCH_NOT_CREATE_FILE}',
   args1: [
     {
@@ -45,6 +54,7 @@ var touchBlock = {
       check: 'String'
     }
   ],
+
   extensions: ['validate_touch_time_d'],
   style: 'Filesystem Operations',
   tooltip: '%{BKY_TOUCH_TOOLTIP}',
diff --git a/public/msg/el.js b/public/msg/el.js
index 7b879ec..fe6fff6 100644
--- a/public/msg/el.js
+++ b/public/msg/el.js
@@ -41,7 +41,6 @@ window.MSG = {
   parseError:
     "Σφάλμα ανάλυσης %1:\n%2\n\nΕπιλέξτε 'OK' για να εγκαταλείψετε τις αλλαγές σας ή 'Ακύρωση' για να συνεχίσετε να επεξεργάζεστε το %1."
 };
-
 // This file was automatically generated.  Do not modify.
 
 ('use strict');
diff --git a/public/msg/en.js b/public/msg/en.js
index d9cdf04..27074c8 100644
--- a/public/msg/en.js
+++ b/public/msg/en.js
@@ -1,6 +1,6 @@
 window.MSG = {
   TEXT_PROCESSING: 'Text Processing',
-  FILE_INPUTS: 'File Inputs',
+  FUCTION_INPUTS: 'Function Inputs',
   FILESYSTEM_OPERATIONS: 'Filesystem Operations',
   DIR_OPERATIONS: 'Directory Operations',
   IO_REDIRECTION: 'I/O Redirection',
@@ -807,7 +807,7 @@ Blockly.Msg['REGCOMMON'] = 'Common patterns';
 Blockly.Msg['REGCOMMON_MATCH'] = 'Match %1';
 Blockly.Msg['REGCOMMON_TOOLTIP'] = 'Common regular expression searches';
 Blockly.Msg['REGCOMMON_HELPURL'] = 'https://www.google.com/';
-Blockly.Msg['REGEND'] = 'Lines ends with  %1\n';
+Blockly.Msg['REGEND'] = 'Lines ends with\n';
 Blockly.Msg['REGEND_TOOLTIP'] = 'End of line';
 Blockly.Msg['REGEND_HELPURL'] = 'https://www.google.com/';
 Blockly.Msg['REGFOR'] =
@@ -836,7 +836,7 @@ Blockly.Msg['REGRANGE_NOT'] = 'Not %1';
 Blockly.Msg['REGRANGE_TOOLTIP'] =
   'Match in the file the designated range of characters';
 Blockly.Msg['REGRANGE_HELPURL'] = 'https://www.google.com/';
-Blockly.Msg['REGSTART'] = 'Line starts with  %1 \n';
+Blockly.Msg['REGSTART'] = 'Line starts with\n';
 Blockly.Msg['REGSTART_TOOLTIP'] = 'Start of line';
 Blockly.Msg['REGSTART_HELPURL'] = 'https://www.google.com/';
 
@@ -883,7 +883,7 @@ Blockly.Msg['TEE_TOOLTIP'] =
   'The tee utility copies standard input to standard output, making a copy in zero or more files.';
 Blockly.Msg['TEE_HELPURL'] = 'https://www.google.com/';
 
-Blockly.Msg['TOUCH'] = 'Modify file timestamps \n';
+Blockly.Msg['TOUCH'] = 'Modify file timestamps %1 \n';
 Blockly.Msg['TOUCH_NOT_CREATE_FILE'] =
   'Do not create file if it does not exist %1 \n';
 Blockly.Msg['TOUCH_CHANGE_ACCESS_TIME'] =
@@ -893,7 +893,7 @@ Blockly.Msg['TOUCH_CHANGE_MODIFICATION_TIME'] =
 Blockly.Msg['TOUCH_SPECIFY_TIME_D'] =
   'Change the access and modification times to the specified time \n';
 Blockly.Msg['TOUCH_SPECIFY_TIME_FORMAT_D'] =
-  'Timestamp in YYYY-MM-DD hh:mm:SS[Z (UTC)] %1';
+  'Add date in YYYY-MM-DD hh:mm:SS[Z (UTC)] %1';
 Blockly.Msg['TOUCH_TOOLTIP'] =
   'Set the access and modification time of a file. If the file does not exist, it creates an empty file.' +
   'To insert timestamps you can use the ISO 8601 format: YYYY-MM-DD hh:mm:SS[Z (for UTC)], where:' +