Moving objects can give 3-D depth effect called kinetic depth effect. Draw the following Stereokinetic Effect where rotating circles generates an interesting 3-D effect. Idea from https://michaelbach.de/ot/mot-ske/
In a previous project you drew a tree, which looks too perfect. Add some randomness and color to the tree to make it look a little more realistic. Related Projects:
Make a fun game that tests how fast you can identify very small color variation. You can use colorsys library to vary hue, saturation, brightness, or any combination of them.