twelve's two outer rings spin in two different directions. Edit: after the Minemaker (MSPLUSNine99) sent his idea to MineCorp (danieltub), MineCorp responded, saying that the number 12 was already taken. in a desperate attempt to save the UFO idea, the Minemaker decided to add 2 to 12, creating 14. (just a lil story I wanted to make, most of this didn't actually happen)
credits to yin-yang wolf on YouTube for the twelve design.