Click that green flag! You can choose a regular or irregular polygon. Just enter in a number greater than 3 (the program will ask again if you do not enter in a valid number.) This will be the number of sides of the polygon. The regular polygon will automatically generate, and for maximum viewing comfort, will be as large as possible without leaving the screen. If you want to make a new polygon at any point in the generation process, or after, just press space to start over.
Inspired by Shape Maker by pookman4. All programming by me. NOTES: A "regular" polygon is a shape with at least 3 sides, all sides straight, and sides and angles equal. Decimals will be rounded down. Irregular polygons will look VERY similar to the regular counterpart, but the bottom side will show the change. It will be tilted to one side.