Rubik's Clock is a puzzle that was released in the 80's and has been an official event in Rubik's cube competitions for many years. The puzzle has two sides with nine clocks on each side. On the edges of the puzzle you will find wheels that you can turn to rotate the hands on the clocks. In addition, there are four buttons that determine which of the clocks should rotate. The goal is to get all the hands on the twelve-stroke at the same time. It's not easy. Will you accept the challenge?