The roulette game is normally played using an elongated table. At one end is the roulette wheel, with a notch in the table where the dealer stands. The surface of the table has a felt layout on it with boxes for the numbers 1 through 36 arranged in three columns of twelve rows. At the end of the part of the layout that is nearest to the dealer, above 1, 2, and 3, are boxes for 0 and 00. Each of the numbers 1 through 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 several other boxes for “outside bets,” encompassing up to 18 numbers at a time. Most of the areas for outside bets are on the long side of the table across from the dealer. Lastly, at the other end of the rectangle away from the dealer are boxes for bets on each 12-number column.
The wheel itself has 38 numbered slots, each slot with the same colored background as the corresponding number that is found on the table layout. The roulette ball used to be made with ivory; nowadays it’s usually made from plastic. The dealer spins the wheel in one direction, and spins 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 off the track toward the wheel itself, and bounces around until it falls into a numbered slot.
Roulette is solely a game of chance, and no way of betting, money management, or careful observation will help you win every single time. Many have tried it, and many have failed. You must not forget that the roulette wheel is 100% random.