The roulette game is usually played using an elongated table. At one end of the table is a roulette wheel, with a notch in the table for the dealer to stand at. The surface of the table is covered with a felt layout with boxes for the numbers 1 through 36 arranged in three columns of twelve rows. At the end of the section of the layout that is nearest to the dealer, above 1, 2, and 3, are boxes for 0 and 00. Each of the numbers from 1 to 36 is surrounded by either a red or black oval or rectangle. The 0 and 00 have green backgrounds. This rectangular grid, with a box for each number, is used for what you call “inside bets.”
Other than the numbered boxes are some other boxes for “outside bets,” encompassing up to 18 numbers at one time. Most of the areas for outside bets are on the long side of the table across from the dealer. Also, at the other side of the rectangle away from the dealer are boxes for bets on each 12-number column.
The roulette wheel has 38 numbered slots, each slot with the same colored background as the corresponding number on the table layout. The roulette ball used to be made with ivory; nowadays it’s most of the time made from plastic. The dealer spins the wheel in one direction, and hurls the ball in the other direction around a track on the bowl-shaped recess that holds the wheel. When the speed of the ball slows down, it falls from the track toward the wheel itself, and bounces around until it falls into a numbered slot.
Roulette is purely a game of chance, and no style of betting, money management, or careful observation can help you win every time. Everyone who have tried it failed. You must remember that the roulette wheel is completely random.