The game of American Roulette is played on a wheel which consists of thirty-eight slots, each with its own number. The numbers on a Roulette wheel are 1-36, 0, and 00. The numbers alternate pairs of odd numbers with pairs of even numbers. The numbers also alternate between black and red. Both the 0 and 00 slots are green. A dealer, or croupier spins the wheel in one direction and then rolls a small ball in the other direction. The ball then drops into one of the slots as it begins to slow down.