in processing js, you could use the draw function to create animated programs, if you have not yet taken the intro to Processing JS, I would really suggest starting there.

(if you wanna do setTimeOut you could try this piece of code: 

var start = *unit of time*();

draw = function() {

if(*unit of time from the var above*() - start >= *the time to run the code below*) {

*the code to run when the time is up* 

}

};

I'm not necesarly good at DOM, but I think this is it, the code in the draw function will only be ran once.

found the answer

var window=function(){return this;}();

i think that works