Move the mouse pointer.
Reflection I wanted something that would react to mouse gestures and ended up with lots of dots that cycle through the hue when a mouse gets within a certain distance. The dots continue to cycle for a time even after the mouse is out of range. Eventually, the hue for each dot will cycle back to red. There's definitely room for improvement here. For example, I would like to spend time working on a process for creating a better random distribution than the default "go to random" block.
