You can nest several for loops in one another.
In the example on the left, two for loops have been nested to program a chaser light.
If your source code contains errors and you compile then the computer highlights the lines where the compiler thinks there is an error.
In this example there are four errors!
Can you finde them all?
After compiling you can get more information about the errors by clicking on !
Transfer the corrected programme onto your BOB3.