diff --git a/examples/MultiAnimations/MultiAnimations.ino b/examples/MultiAnimations/MultiAnimations.ino
index bbc82ca..0656946 100644
--- a/examples/MultiAnimations/MultiAnimations.ino
+++ b/examples/MultiAnimations/MultiAnimations.ino
@@ -1,6 +1,6 @@
 ///////////////////////////////////////////////////////////////////////////////////////////
 //
-// ALA library example: ALA Example - ComplexMultitasking
+// ALA library example: MultiAnimations
 //
 // Example to demonstrate how to drive different set of LEDs independently
 // using Arduino PWM output pins a TLC5940 chip and an WS2812 strip.
@@ -9,8 +9,8 @@
 //
 ///////////////////////////////////////////////////////////////////////////////////////////
 
-#include "AlaLed.h"
-#include "AlaLedRgb.h"
+#include <AlaLed.h>
+#include <AlaLedRgb.h>
 
 byte tlcPins1[] = { 1, 2, 3 };
 byte tlcPins2[] = { 6,7,8, 9,10,11, 12,13,14 };
@@ -45,3 +45,4 @@ void loop()
   rgbLeds.runAnimation();
   rgbStrip.runAnimation();
 }
+
diff --git a/examples/MultiLedSequence/MultiLedSequence.ino b/examples/MultiLedSequence/MultiLedSequence.ino
index 530ee67..eb73a97 100644
--- a/examples/MultiLedSequence/MultiLedSequence.ino
+++ b/examples/MultiLedSequence/MultiLedSequence.ino
@@ -11,8 +11,16 @@
 #include <AlaLed.h>
 
 AlaLed leds;
+
+// pins where the leds are connected
 byte pins[] = { 5, 6, 9, 10, 11 };
 
+// declare the animation sequence
+// each row has three values:
+// 1 - a numeric code identifying the desired animation, valid codes are listed in the Ala.h
+// 2 - the duration of the loop animationin milliseconds
+// 3 - the total duration of the animation in milliseconds
+
 AlaSeq seq[] =
 {
   { ALA_FADEIN, 1000, 1000 },
@@ -36,11 +44,15 @@ AlaSeq seq[] =
 
 void setup()
 {
-  leds.initPWM(3, pins);
+  // initialize the 5 leds attached to PWM pins
+  leds.initPWM(5, pins);
+
+  // set the animation sequence
   leds.setAnimation(seq);
 }
 
 void loop()
 {
+  // run the animation
   leds.runAnimation();
 }
diff --git a/examples/RgbLedSequence/RgbLedSequence.ino b/examples/RgbLedSequence/RgbLedSequence.ino
index 4abd611..d17d948 100644
--- a/examples/RgbLedSequence/RgbLedSequence.ino
+++ b/examples/RgbLedSequence/RgbLedSequence.ino
@@ -5,7 +5,7 @@
 // Example to demonstrate how to create an animation sequence for one RGB LED.
 // The example also shows how to create and use a custom color palette.
 //
-// Web page: http://yaab-arduino.blogspot.com/p/ala-example-rgbledsequence.html
+// Web page: http://yaab-arduino.blogspot.com/p/ala-example-rgbledseq.html
 //
 ///////////////////////////////////////////////////////////////////////////////////////////
 
@@ -17,21 +17,21 @@
 
 AlaLedRgb rgbLed;
 
-// custom palette :     black   , white   , black   , red     , green   , blue
+// custom palette :         black     white     black     red       green     blue
 AlaColor mycolors_[6] = { 0x000000, 0xFFFFFF, 0x000000, 0xFF0000, 0x00FF00, 0x0000FF };
 AlaPalette mycolors = { 6, mycolors_ };
 
 
 AlaSeq seq[] =
 {
-  { ALA_CYCLECOLORS, 3000, alaPalRgb, 3000 },
-  { ALA_OFF, 1000, alaPalNull, 1000 },
-  { ALA_FADECOLORSLOOP, 4000, alaPalRgb, 8000 },
-  { ALA_FADECOLORSLOOP, 500, mycolors, 4000 },
-  { ALA_OFF, 1000, alaPalNull, 1000 },
-  { ALA_FADECOLORS, 5000, mycolors, 5000 },
-  { ALA_OFF, 1000, alaPalNull, 1000 },
-  { ALA_ENDSEQ, 0, alaPalNull, 0 }
+  { ALA_CYCLECOLORS, 3000, 3000, alaPalRgb },
+  { ALA_OFF, 1000, 1000, alaPalNull },
+  { ALA_FADECOLORSLOOP, 4000, 8000, alaPalRgb },
+  { ALA_FADECOLORSLOOP, 500, 4000, mycolors },
+  { ALA_OFF, 1000, 1000, alaPalNull },
+  { ALA_FADECOLORS, 5000, 5000, mycolors },
+  { ALA_OFF, 1000, 1000, alaPalNull },
+  { ALA_ENDSEQ }
 };
 
 
@@ -50,3 +50,4 @@ void loop()
 {
   rgbLed.runAnimation();
 }
+
diff --git a/examples/AlaRgbStripDemo/AlaRgbStripDemo.ino b/examples/RgbStripButton/RgbStripButton.ino
similarity index 66%
rename from examples/AlaRgbStripDemo/AlaRgbStripDemo.ino
rename to examples/RgbStripButton/RgbStripButton.ino
index 459cd72..8e82f4d 100644
--- a/examples/AlaRgbStripDemo/AlaRgbStripDemo.ino
+++ b/examples/RgbStripButton/RgbStripButton.ino
@@ -1,6 +1,20 @@
+///////////////////////////////////////////////////////////////////////////////////////////
+//
+// ALA library example: RgbStripButton
+//
+// Example to demonstrate how to switch animations using three buttons.
+// The first button change the animation.
+// The second button the color palette.
+// The third button change the animation speed.
+//
+// Button library is required: http://playground.arduino.cc/Code/Button
+//
+// Web page: http://yaab-arduino.blogspot.com/p/ala-example-rgbstripbutton.html
+//
+///////////////////////////////////////////////////////////////////////////////////////////
 
-#include "AlaLedRgb.h"
-#include "Button.h"
+#include <AlaLedRgb.h>
+#include <Button.h>
 
 
 AlaLedRgb rgbStrip;
@@ -82,3 +96,4 @@ void updateAnimation()
 {
     rgbStrip.setAnimation(animList[animation%14], durationList[duration%3], paletteList[palette%3]);
 }
+
diff --git a/examples/RgbStripDemo/RgbStripDemo.ino b/examples/RgbStripDemo/RgbStripDemo.ino
deleted file mode 100644
index 5d5e82d..0000000
--- a/examples/RgbStripDemo/RgbStripDemo.ino
+++ /dev/null
@@ -1,65 +0,0 @@
-///////////////////////////////////////////////////////////////////////////////////////////
-//
-// ALA library example: RgbStripDemo
-//
-// Example to demonstrate how to create an animation sequence for a
-// WS2812 RGB LED strip.
-//
-// Web page: http://yaab-arduino.blogspot.com/p/ala-example-rgbstripdemo.html
-//
-///////////////////////////////////////////////////////////////////////////////////////////
-
-#include "AlaLedRgb.h"
-
-AlaLedRgb rgbStrip;
-
-
-AlaSeq seq[] =
-{
-  { ALA_OFF, 1000, alaPalNull, 2000 },
-  { ALA_ON, 1000, alaPalRgb, 2000 },
-  { ALA_SPARKLE, 1000, alaPalRgb, 9000 },
-  { ALA_CYCLECOLORS, 3000, alaPalRgb, 6000 },
-  { ALA_OFF, 1000, alaPalNull, 1000 },
-  { ALA_FADECOLORSLOOP, 3000, alaPalRgb, 6000 },
-  { ALA_SPARKLE2, 1000, alaPalRgb, 6000 },
-  { ALA_OFF, 1000, alaPalNull, 1000 },
-  { ALA_SPARKLE2, 1000, alaPalFire, 6000 },
-  { ALA_PIXELSMOOTHSHIFTRIGHT, 2000, alaPalRgb, 6000 },
-  { ALA_OFF, 1000, alaPalNull, 1000 },
-  { ALA_MOVINGBARS, 3000, alaPalRgb, 6000 },
-  { ALA_COMET, 3000, alaPalRgb, 6000 },
-  { ALA_COMETCOL, 3000, alaPalRgb, 6000 },
-  { ALA_OFF, 1000, alaPalNull, 1000 },
-  { ALA_GLOW, 3000, alaPalRgb, 6000 },
-  { ALA_OFF, 1000, alaPalNull, 1000 },
-  { ALA_FIRE, 1000, alaPalFire, 6000 },
-  { ALA_OFF, 1000, alaPalNull, 1000 },
-  { ALA_BOUNCINGBALLS, 1000, alaPalRgb, 6000 },
-  { ALA_OFF, 1000, alaPalNull, 1000 },
-  { ALA_BUBBLES, 1000, alaPalRainbow, 6000 },
-  { ALA_ENDSEQ, 0, NULL, 0 }
-};
-/*
-AlaPalette paletteList[3] = {
-    alaPalRgb,
-    alaPalRainbow,
-    alaPalFire
-};
-*/
-void setup()
-{
-  delay(1000);
-  
-  rgbStrip.initWS2812(60, 6);
-  
-  rgbStrip.setBrightness(0x444444);
-
-  rgbStrip.setAnimation(seq);
-}
-
-void loop()
-{
-  rgbStrip.runAnimation();
-}
-
diff --git a/examples/RgbStripSequence/RgbStripSequence.ino b/examples/RgbStripSequence/RgbStripSequence.ino
new file mode 100644
index 0000000..aa800be
--- /dev/null
+++ b/examples/RgbStripSequence/RgbStripSequence.ino
@@ -0,0 +1,60 @@
+///////////////////////////////////////////////////////////////////////////////////////////
+//
+// ALA library example: RgbStripSequence
+//
+// Example to demonstrate how to create an animation sequence for a
+// WS2812 RGB LED strip.
+//
+// Web page: http://yaab-arduino.blogspot.com/p/ala-example-rgbstripseq.html
+//
+///////////////////////////////////////////////////////////////////////////////////////////
+
+#include <AlaLedRgb.h>
+
+AlaLedRgb rgbStrip;
+
+
+AlaSeq seq[] =
+{
+  { ALA_OFF,            1000, 2000, alaPalNull },
+  { ALA_ON,             1000, 2000, alaPalRgb },
+  { ALA_SPARKLE,        1000, 9000, alaPalRgb },
+  { ALA_CYCLECOLORS,    3000, 6000, alaPalRgb },
+  { ALA_OFF,            1000, 1000, alaPalNull },
+  { ALA_FADECOLORSLOOP, 3000, 6000, alaPalRgb },
+  { ALA_SPARKLE2,       1000, 6000, alaPalRgb },
+  { ALA_OFF,            1000, 1000, alaPalNull },
+  { ALA_SPARKLE2,       1000, 6000, alaPalFire },
+  { ALA_PIXELSMOOTHSHIFTRIGHT, 6000, 2000, alaPalRgb },
+  { ALA_OFF,            1000, 1000, alaPalNull },
+  { ALA_MOVINGBARS,     3000, 6000, alaPalRgb },
+  { ALA_COMET,          3000, 6000, alaPalRgb },
+  { ALA_COMETCOL,       3000, 6000, alaPalRgb },
+  { ALA_OFF,            1000, 1000, alaPalNull },
+  { ALA_GLOW,           3000, 6000, alaPalRgb },
+  { ALA_OFF,            1000, 1000, alaPalNull },
+  { ALA_FIRE,           1000, 6000, alaPalFire },
+  { ALA_OFF,            1000, 1000, alaPalNull },
+  { ALA_BOUNCINGBALLS,  1000, 6000, alaPalRgb },
+  { ALA_OFF,            1000, 1000, alaPalNull },
+  { ALA_BUBBLES,        1000, 6000, alaPalRainbow },
+  { ALA_ENDSEQ }
+};
+
+
+void setup()
+{
+  delay(1000);
+  
+  rgbStrip.initWS2812(60, 6);
+  
+  rgbStrip.setBrightness(0x444444);
+
+  rgbStrip.setAnimation(seq);
+}
+
+void loop()
+{
+  rgbStrip.runAnimation();
+}
+
diff --git a/examples/SimpleLed/SimpleLed.ino b/examples/SimpleLed/SimpleLed.ino
index 6e8a35d..f1aa84c 100644
--- a/examples/SimpleLed/SimpleLed.ino
+++ b/examples/SimpleLed/SimpleLed.ino
@@ -8,14 +8,13 @@
 //
 ///////////////////////////////////////////////////////////////////////////////////////////
 
- 
 #include <AlaLed.h>
 
 AlaLed alaLed;
 
 void setup()
 {
-  // initialize the led attached to pin 11
+  // initialize the led attached to pin 11 with PWM driver
   alaLed.initPWM(11);
   
   // set a fading animation with a duration of 2 seconds
@@ -24,6 +23,7 @@ void setup()
 
 void loop()
 {
-  // animate the led
+  // run the animation
   alaLed.runAnimation();
 }
+
diff --git a/examples/SimpleLed/schematic/SimpleLed_bb.png b/examples/SimpleLed/schematic/SimpleLed_bb.png
index dd58c47..a32b47e 100644
Binary files a/examples/SimpleLed/schematic/SimpleLed_bb.png and b/examples/SimpleLed/schematic/SimpleLed_bb.png differ
diff --git a/examples/SimpleLed/schematic/SimpleLed_schem.png b/examples/SimpleLed/schematic/SimpleLed_schem.png
index fc4211c..27bdf24 100644
Binary files a/examples/SimpleLed/schematic/SimpleLed_schem.png and b/examples/SimpleLed/schematic/SimpleLed_schem.png differ
diff --git a/examples/SimpleRgbLed/SimpleRgbLed.ino b/examples/SimpleRgbLed/SimpleRgbLed.ino
index 8aa663e..953dde6 100644
--- a/examples/SimpleRgbLed/SimpleRgbLed.ino
+++ b/examples/SimpleRgbLed/SimpleRgbLed.ino
@@ -27,3 +27,4 @@ void loop()
 {
   rgbLed.runAnimation();  // run the animation indefinitely
 }
+
diff --git a/examples/SimpleRgbStrip/SimpleRgbStrip.ino b/examples/SimpleRgbStrip/SimpleRgbStrip.ino
index 537b884..9c6cef2 100644
--- a/examples/SimpleRgbStrip/SimpleRgbStrip.ino
+++ b/examples/SimpleRgbStrip/SimpleRgbStrip.ino
@@ -1,26 +1,30 @@
 ///////////////////////////////////////////////////////////////////////////////////////////
 //
-// ALA library example: RgbStrip
+// ALA library example: SimpleRgbStrip
 //
 // Example to demonstrate how to create display a color-fading animation for a
 // WS2812 RGB LED strip.
 //
-// Web page: http://yaab-arduino.blogspot.com/p/ala-example-rgbstrip.html
+// Web page: http://yaab-arduino.blogspot.com/p/ala-example-simplergbstrip.html
 //
 ///////////////////////////////////////////////////////////////////////////////////////////
 
-#include "AlaLedRgb.h"
+#include <AlaLedRgb.h>
 
 AlaLedRgb rgbStrip;
 
 void setup()
 {
+  // initialize the WS2812 strip with 30 leds on pin 6
   rgbStrip.initWS2812(30, 6);
   
+  // set a color-fading animation with a duration of 5 seconds and an RGB palette
   rgbStrip.setAnimation(ALA_FADECOLORSLOOP, 5000, alaPalRgb);
 }
 
 void loop()
 {
+  // run the animation
   rgbStrip.runAnimation();
 }
+
diff --git a/examples/SimpleTlc5940/SimpleTlc5940.ino b/examples/SimpleTlc5940/SimpleTlc5940.ino
index e86bb5e..4b02267 100644
--- a/examples/SimpleTlc5940/SimpleTlc5940.ino
+++ b/examples/SimpleTlc5940/SimpleTlc5940.ino
@@ -8,7 +8,7 @@
 //
 ///////////////////////////////////////////////////////////////////////////////////////////
 
-#include "AlaLed.h"
+#include <AlaLed.h>
 
 AlaLed alaLed;
 
@@ -24,3 +24,4 @@ void loop()
 {
   alaLed.runAnimation();
 }
+
diff --git a/library.properties b/library.properties
index 0d290ab..31e04f9 100644
--- a/library.properties
+++ b/library.properties
@@ -1,5 +1,5 @@
 name=ALA
-version=2.2.0
+version=2.3
 author=bportaluri
 maintainer=Bruno Portaluri <bportaluri@gmail.com>
 sentence=Arduino Light Animation (ALA) is a library
diff --git a/src/Ala.cpp b/src/Ala.cpp
index 16a9593..769cdb5 100644
--- a/src/Ala.cpp
+++ b/src/Ala.cpp
@@ -1,7 +1,5 @@
 #include "Ala.h"
 
-#include "Arduino.h"
-
 
 int getStep(long t0, long t, int v)
 {
diff --git a/src/Ala.h b/src/Ala.h
index 02b5dc5..22fc1e1 100644
--- a/src/Ala.h
+++ b/src/Ala.h
@@ -2,9 +2,9 @@
 #define Ala_h
 
 #include <stdint.h>
-
 #include "Arduino.h"
 
+
 ////////////////////////////////////////////////////////////////////////////////
 // Drivers
 
@@ -65,7 +65,7 @@
 
 ////////////////////////////////////////////////////////////////////////////////
 
-typedef struct AlaColor
+struct AlaColor
 {
     union
     {
@@ -130,22 +130,22 @@ typedef struct AlaColor
 	
     
     typedef enum {
-        Aqua=0x00FFFF,
-        Black = 0x000000,
-        Blue = 0x0000FF,
-        Cyan=0x00FFFF,
-        Gold=0xFFD700,
-        Gray = 0x808080,
-        Green=0x008000,
-        Lime=0x00FF00,
-        Magenta=0xFF00FF,
-        Navy=0x000080,
-        Olive=0x808000,
-        Purple=0x800080,
-        Red=0xFF0000,
-        Teal=0x008080,
-        White=0xFFFFFF,
-        Yellow=0xFFFF00
+        Aqua    = 0x00FFFF,
+        Black   = 0x000000,
+        Blue    = 0x0000FF,
+        Cyan    = 0x00FFFF,
+        Gold    = 0xFFD700,
+        Gray    = 0x808080,
+        Green   = 0x008000,
+        Lime    = 0x00FF00,
+        Magenta = 0xFF00FF,
+        Navy    = 0x000080,
+        Olive   = 0x808000,
+        Purple  = 0x800080,
+        Red     = 0xFF0000,
+        Teal    = 0x008080,
+        White   = 0xFFFFFF,
+        Yellow  = 0xFFFF00
     } ColorCodes;
 } ;
 
@@ -155,7 +155,7 @@ typedef struct AlaColor
 // Struct definitions
 ////////////////////////////////////////////////////////////////////////////////
 
-typedef struct AlaPalette
+struct AlaPalette
 {
     int numColors;
     AlaColor *colors;
@@ -192,12 +192,12 @@ typedef struct AlaPalette
 };
 
 
-typedef struct AlaSeq
+struct AlaSeq
 {
     int animation;
     long speed;
-    AlaPalette palette;
     long duration;
+    AlaPalette palette;
 };
 
 
diff --git a/src/AlaLed.cpp b/src/AlaLed.cpp
index 5da4056..a33995e 100644
--- a/src/AlaLed.cpp
+++ b/src/AlaLed.cpp
@@ -3,14 +3,13 @@
 #include "ExtTlc5940.h"
 
 
-
 AlaLed::AlaLed()
 {
-	maxOut=255;
+	maxOut = 255;
 	speed = 1000;
 	animSeqLen = 0;
-	lastRefreshTime=0;
-	refreshMillis=1000/50;
+	lastRefreshTime = 0;
+	refreshMillis = 1000/50;
 }
 
 
@@ -36,10 +35,8 @@ void AlaLed::initPWM(int numLeds, byte *pins)
 	}
 
 	// allocate and clear leds array
-	if((leds = (byte *)malloc(numLeds)))
-	{
-		memset(leds, 0, numLeds);
-	}
+	leds = (byte *)malloc(numLeds);
+	memset(leds, 0, numLeds);
 }
 
 void AlaLed::initTLC5940(int numLeds, byte *pins)
@@ -49,10 +46,8 @@ void AlaLed::initTLC5940(int numLeds, byte *pins)
 	this->pins = pins;
 
 	// allocate and clear leds array
-	if((leds = (byte *)malloc(numLeds)))
-	{
-		memset(leds, 0, numLeds);
-	}
+	leds = (byte *)malloc(numLeds);
+	memset(leds, 0, numLeds);
 
 	Tlc.init(0);
 }
diff --git a/src/AlaLed.h b/src/AlaLed.h
index f5ce647..07fdd64 100644
--- a/src/AlaLed.h
+++ b/src/AlaLed.h
@@ -1,7 +1,6 @@
 #ifndef AlaLed_h
 #define AlaLed_h
 
-#include "Arduino.h"
 #include "Ala.h"
 
 
@@ -97,10 +96,10 @@ class AlaLed
 	void flame();
 
 
-    byte driver;
-    byte *pins;
-    byte *leds;
-    int numLeds;
+    byte driver; // type of led driver: ALA_PWM, ALA_TLC5940
+    byte *pins;  // pins where the leds are attached to
+    byte *leds;  // array to store leds brightness values
+    int numLeds; // number of leds
     
     int maxOut;
     int refreshMillis;
diff --git a/src/AlaLedRgb.cpp b/src/AlaLedRgb.cpp
index 55f91bd..979751c 100644
--- a/src/AlaLedRgb.cpp
+++ b/src/AlaLedRgb.cpp
@@ -1,11 +1,10 @@
 #include "Ala.h"
 #include "AlaLedRgb.h"
 
-#include "Arduino.h"
-
 #include "ExtNeoPixel.h"
 #include "ExtTlc5940.h"
 
+
 Adafruit_NeoPixel *neopixels;
 
 
@@ -45,10 +44,8 @@ void AlaLedRgb::initPWM(int numLeds, byte *pins)
 	}
 
 	// allocate and clear leds array
-	if((leds = (AlaColor *)malloc(3*numLeds)))
-	{
-		memset(leds, 0, 3*numLeds);
-	}
+	leds = (AlaColor *)malloc(3*numLeds);
+	memset(leds, 0, 3*numLeds);
 }
 
 void AlaLedRgb::initTLC5940(int numLeds, byte *pins)
@@ -58,14 +55,8 @@ void AlaLedRgb::initTLC5940(int numLeds, byte *pins)
 	this->pins = pins;
 
 	// allocate and clear leds array
-	if(leds = (AlaColor *)malloc(3*numLeds))
-	{
-		memset(leds, 0, 3*numLeds);
-	}
-
-	//pins = (byte *)malloc(numLeds);
-	//for(int i=0; i<numLeds; i++)
-    //    pins[i] = i;
+	leds = (AlaColor *)malloc(3*numLeds);
+	memset(leds, 0, 3*numLeds);
 
 	Tlc.init(0);
 }
@@ -74,13 +65,11 @@ void AlaLedRgb::initWS2812(int numLeds, byte pin, byte type)
 {
 	this->driver = ALA_WS2812;
 	this->numLeds = numLeds;
-	this->pins = pins;
+	//this->pins = pins;
 
 	// allocate and clear leds array
-	if((leds = (AlaColor *)malloc(3*numLeds)))
-	{
-		memset(leds, 0, 3*numLeds);
-	}
+	leds = (AlaColor *)malloc(3*numLeds);
+	memset(leds, 0, 3*numLeds);
 
 	neopixels = new Adafruit_NeoPixel(numLeds, pin, type);
 	
diff --git a/src/AlaLedRgb.h b/src/AlaLedRgb.h
index f86aeba..1bcd7c9 100644
--- a/src/AlaLedRgb.h
+++ b/src/AlaLedRgb.h
@@ -1,7 +1,6 @@
 #ifndef AlaLedRgb_h
 #define AlaLedRgb_h
 
-
 #include "Ala.h"
 
 
@@ -89,11 +88,11 @@ class AlaLedRgb
 	void bubbles();
 	
 
-	byte driver;
-	byte *pins;
-	byte pin;
-	AlaColor *leds;
-	int numLeds;
+	byte driver;    // type of led driver: ALA_PWM, ALA_TLC5940
+	byte *pins;     // pins where the leds are attached to
+	//byte pin;      
+	AlaColor *leds; // array to store leds brightness values
+	int numLeds;    // number of leds
     
 	int animation;
 	int currAnim;