Click the lightbulbs to change it
Press w to see another frame you made.
Press a to save this frame.
Press s to start this animation.
Press s and Space together to make it to repeat the animation.
(If you do this, you cannot stop until you click the red button)
Press d to delete a frame.
The variable at right tells you the number of frames.
The variable at left tells you which frame you are on now.
Comment what you don't understand and someone will tell you.
Please do not advertise unless it is related to this project.