update to drawing program

https://editor.p5js.org/zoomguim220/sketches/_MFhWO12G

What I accomplished. the methods I used to try and get a second brush shape to work has shown some success. I can get it to draw and change colors however the brush doesn't stop drawing. This has been troubling me for a while and I have become stuck onto it. other then that I did get a way to actually make a brush tracker to be able to use it but that wasn't as successful and didn't end up working finality there's some simple code to try and get the background to change to a different color that I was wondering if I could get working, but couldn't in the time allowed.