For this project, I made a small project about the “mouse/cursor key”. When I was small, I liked to change the cursor key into different shape and size and I found it quite fun. And sometimes there will be trace when moving it. So I made an interactive key that one can adjust its size and choose to leave a trace or not.
Basically one can use up and down keys to change its size, and when mouse pressing there will be trace. The main function I used is the mouseIsPressed that could capture the mouse down events.