Slide the variable "automatic?" to choose between changing the color by yourself or not. Slide the color, well, to change the color.
Notice how I made this using individual "pixels"(not really pixels) only made of the colors red, green, and blue, not just the color effect feature. They create an illusion when some of them are put together. For example, the "yellow" is made of green and red and the "purple" is made of red and blue, etc. This is how your computer monitor and your tv work. It only used those three colors, and so when you think you see yellow, it's actually fake yellow and when you think you see purple it's actually fake purple So really this project is pretty pointless since you can just create the colors normally on scratch, but it is a cool illusion. I have a new project in the making so expect a project soon