I have not yet caught on to how to do loops and arrays. I need to make an image of a test pattern. I have figured out the colors and sizes of the bars but not how to actually make the bars. How do I start?
I don't understand what you mean. You can create an image using 'new GreenfootImage(xsize, ysize)', specifying whatever you want for xsize and ysize, and you can set that image as the actor image using setImage(...).