It is more like a game. You need turn the dial to find the sweet spot. the three LED is a signal that: RED = You need to turn it more, YELLOW = You are close, GREEN = You are on the unlocking spot. Once you are on GREEN light, you can press the button (rotary encoder button/switch) and proceed to find the next unlock spot. If you got the unlocking spot right. The BLUE light will turn on. If you got on the wrong spot. All lights will blink for a second, meaning you need to start again. You need to find the unlock spot 4 times to win. You can change the “int scoreCounter” value to adjust how many times you need to get the unlock spot to win.