The pointilist school of painters created their paintings by dabbing their paintbrush perpendicularly on the canvas and creating one dab/point of color at a time. Each dab is similar to a single pixel in a digital image. The human viewer of the artwork would stand back and a smooth picture would be perceived. Implement a program to do pointilist art. The program should present a palette of colors and some other options, such as choosing paintbrush size or whether '+' or 'XOR' would be used for dabbing, etc. When your program is working, create a painting of a starry night. Your program should work with an external file representing in progress so that a user could save the session for later continuation.