The numbers are arranged in a random pattern, but he colors alternate red and black. The numbers are colored red or black except for the zero and double zero which are on green slots. In America, the wheel has 38 numbers: 1-36, zero, and double zero.
Players place their bets on the table and hope that a ball spun on the inside of the wheel lands in the corresponding slot on the wheel. When you first sit down at the roulette table you will notice a wheel divided into 38 numbered and colored slots and a table with the same numbers and colors.