Arrow Keys to move the Seesaw --------------------------Seesaw Illusion-------------------------- Why do the balls, when higher up, end up closer to the end of the seesaw? What happens is that the balls are fixed to a certain x-axis, and their y-position increases as the seesaw is raising or lowering them. When one corner of the seesaw rises, the other lowers, causing the height to decrease by the vertex closest to the ball that is on top of it. This creates an illusion: The seesaw is not sliding to one side, what happens is that the balls are stationary on the x-axis while their corner rises or falls. We also cannot forget that the blue bar is supported by a ball, causing the bar to rotate around the support, which is the red ball.
