at the beginning keep clickin the button to change the number, for every new number, click the button (the one to open the thing) and when a light turns green that number is right
when all lights are green click the button it should open
at the beginning keep clickin the button to change the number, for every new number, click the button (the one to open the thing) and when a light turns green that number is right
when all lights are green click the button it should open