The green button, informally known as a toggle button, is a tile in Chip's Challenge that causes all toggle walls contained in a level to switch state. If a green button is touched by any moving object, the walls switch, but two separate presses of different buttons on the same turn will cancel each other out. Therefore, if an odd number of presses occur on the same turn, the wall will switch; if it is an even number, nothing at all happens (the latter case is one of the only two possible ways to solve Perfect Match in CC1, the other being the Concussion Rule).