add orglogowide and fix workbook courses

docs/calliope/arbeitsheft/23-4_fitness.md

@@ -1,7 +1,7 @@
 # 23 4_Fitness
 
 ```ghost
-let Tempo = 1000
+let tempo = 1000
 basic.setLedColor(0xff0000)
 basic.pause(tempo)
 for (let index = 0; index < 2; index++) {
@@ -37,8 +37,8 @@ Complete your program.
 ## Use variables @showdialog
 Use a variable to define the speed of your animation and adjust it easily.
 
-## Create variable Tempo
-Create a ``||variables.variable||`` and name it "Tempo".
+## Create variable tempo
+Create a ``||variables.variable||`` and name it "tempo".
 
 ```
 ```

docs/calliope/arbeitsheft/33-4_licht.md

@@ -1,23 +1,24 @@
 # 33 4 Light
 
 ```ghost
+let brightness = input.lightLevel();
 input.onButtonEvent(Button.B, input.buttonEventClick(), function () {
-basic.showNumber(Licht)
+basic.showNumber(brightness)
 })
 ```
 
 ## Task @showdialog
 Write a program that saves the measured light value in a variable when the LED matrix is switched off and then display the saved value on the LED matrix.
 
 ## Create variable
-Create a ``||variables.variable||`` and name it "Light".
+Create a ``||variables.variable||`` and name it "brightness".
 
 ```
 ```
 ![](https://calliope.cc/tutorials/variable_licht.png)
 
 ## Save light intensity @showdialog
-If button A is clicked, save the measured light intensity in the variable "Light".
+If button A is clicked, save the measured light intensity in the variable "brightness".
 
 ## Define input
 Select the block ``||input.on button A is clicked|||`` as input.
@@ -28,15 +29,15 @@ Use the ``||variables.set light to||`` block to set the value of the variable to
 
 
 ## Show light intensity @showdialog
-When button B is clicked, show the value of the variable "Light".
+When button B is clicked, show the value of the variable "brightness".
 
 ## Define input
 Place another block ``|| input.on button A ||`` clicked and change it to ``|| input.on button B ||`` clicked.
 
 ![Button B](https://calliope.cc/tutorials/kopf_a_b.png)
 
 ## Define output
-Use the ``|| basic.show number||`` block and display the value of the variable``||variables.light||``.
+Use the ``|| basic.show number||`` block and display the value of the variable``||variables.brightness||``.
 
 
 ## Done! 👏

docs/calliope/arbeitsheft/50-2_personenzaehler.md

@@ -69,4 +69,4 @@ Click on ``|Download|`` to transfer your program to your Calliope mini and test
 
 ```package
 grove=github:calliope-edu/pxt-grove
-
+```