A cool experiment. Select an operator (% is modulo), then drag the points around. This gets the distance from a pixel to both the circles, then puts the selected operator between them, (eg. d1 * d2). If the result is below a certain threshold, the pixel turns a colour, otherwise, it turns white.
Remixed from @grkw2020's original project, but the pen colour is now set to the operation result (mod 200 to account for Scratch only having 200 pen colours), giving interesting results!