TolpuddleSartre:
void LEDaan2(){
loop;{
What's that?
Bad_At_Coding:
That's to point out to which pin the LED is connected to. This shouldn't interfere with the rest of the code.
LEDaan2 is to activate one of the LED's. i used loop to make the go on and of continuously if the button is pressed.
I'll go out on a limb and state that I believe what @TolpuddleSartre means is that it is syntactically misshapen.