Slide the color variable to get the color you want. You can see your color in the "This is your color" box. Click down to draw. Click the box "+1 Size" to make your pen bigger. Click the box "-1 Size to make your pen smaller. Click the box "Erase all" to erase all. Full screen recommended.
Giving credit to 5queen2016 for music thank you 5queen2016. All the rest of the coding was me.