Press...

• 1 for red
• 2 for blue
• 3 for yellow
• 4 for green
• 5 for purple
• 6 for black
• 7 for white
• 8 for erasing

• Up arrow to make brush bigger
• Down arrow to make brush smaller
• Shift to reset the canvas

Enjoy!

Be careful! The canvas will be wiped when the window is resized!