This is a short painting program I wrote to mimic the functionality of MS Paint, but Open-Source and with a cleaner UI. Hit Left Arrow/Right Arrow to cycle through pre-defined colors (I am working on a version with manual RGB selection). Hit Up Arrow/Down Arrow to alter the size of the Tpen. Left click to raise/lower the Tpen. Hit S to save as a JPEG. Make sure to place the turtle window on full screen, it should automatically match your monitors aspect ratio.