Greenfoot modulo

That code does not work because the compiler has no idea what "mod" is. The correct mathematical operator that you are looking for is "%". Please refer to the Java tutorial page on operators. If your code has i incrementing each act cycle and the action to perform is to be executed each and every time that i is a multiple of 10, then you might want to use this: That is, of course, unless you need to know how many cycles through ten have been executed.

Oh, I didn't know that, I'm sorry. But it works fine now, thank you!