Click on the dot to change its color. What you can't do is: - Click and hold the mouse on the circle. - Click somewhere else and hold the mouse down over the circle. - Click on the circle and hold the mouse down off of it then on again.
I know it's not the most exciting project, but mouse clicks are a pain to get right when you use pen most of the time. Here's a simple script for that! Feel free to use it in your projects if you want (don't even worry about giving credit, it's only one block).