Paintin' ain't easy. Here's a basic drawing program example, featuring undo (CTRL+Z), redo (CTRL+Y), brush size and color settings, the option to save an image as a bitmap, or a (simply encrypted) project file (*.akhc) and reload it for work later on. The source file is included in the zip, but if you want a direct link click here: http://willhostforfood.com/files3/4669754/AKHCanvas.gmk uses execute_string for the purpose of simplicity and I HAVEN'T MADE ANYTHING IN GM IN AGES.