1º_ It is the name of a game of chance and the artifact that is used to choose a random winning option. It is a wheel or disc placed vertically that has written on its edge the names of different prizes, and that is rotated until it stops by itself in the position of one that will be chosen by fortune. Watch Roulette . 2º_ For some similarity in appearance and because both are found in fairs and amusement parks, it was also called 'Ferris wheel' to a mechanical game with chairs or gondolas attached to the perimeter of a large circular metal structure that when rotating vertically raised those chairs and their occupants to several meters giving a panoramic view of the place. See around the world , Ferris wheel , Moscow wheel , Chicago wheel , Ferris wheel . 3º_ For the above, it is a locution that refers to the unforeseen and unstable events where life takes us, sometimes up and sometimes down. 4º_ Name of a tarot card.