p5.js for loops and arrays

So pretty much I wanted to create a project that had random lights but it didn't come out the way I wanted it to come out. it just was blank white circles instead of random colors. I attended to create a picture of Abe Lincoln with multiple colors. I definitely need to speak to Professor Hagan on how to create random lights.

here is what came out

Honestly for the final project, I was thinking of doing a Space Invaders game or something similar to it. I've been looking at others coding something similar within p5.js but I definitely don't want to limit it to one color to be honest.