This is a very nice puzzle to solve. It can be either solvable or un-solvable (like all riddles) by adding or removing one step. I won't go into details, you can see the video. But before you do keep this in mind: You will be asked to pause and try to solve the puzzle. If you really love solving puzzles let me tell you that this one with 12 steps is not possible to solve. Instead you need to remove one step and make them 11. It has a really nice solving methodology though! Go ahead, give it a try.