Just adding to Andrew's Project (Hold space to draw) The "S" Button in the corner is the size. When you click it it will open up the SIZE Gui. -KEEP SCROLLING- Click the color you want to use. This is just a demo, so Andrew will make the real thing later. :D
All I did was add two more colors; @Andrew22111 did the rest, so they deserve all the credit. This is meant for them to see, and maybe remix so I can delete it.