Pages to see:

Try to fill the area with red.

The first challenge is the easy one with 26 dots click and drag them around the scene to make one continuous red rectangle.

You can refresh the page to get a new starting position, and there is no win condition so don't try to find the one pixel that is missing. The second is slightly harder with only 25 dots to fill the scene. The third one only has 24 dots, and i'm not sure if it's actually doable, but it may be so try.