The game of roulette is usually played at an elongated table. At one end of the table is a roulette wheel, with a notch in the table where the dealer stands. The table has a felt layout on it with boxes numbered from 1 to 36 arranged in three columns of twelve rows. At the end of the part of the layout closest to the dealer, above the numbers 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 a couple of 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 with the same colored background as the corresponding number that is found on the table layout. The small, hard ball used to be made with ivory; nowadays it is most of the time plastic. The dealer spins the wheel in one direction, then hurls the ball in the opposite direction around a track on the bowl-shaped recess that holds the wheel. When the speed of the ball decreases, it falls off the track toward the wheel itself, and bounces around until it settles into a numbered slot.
Roulette is solely a game of chance, and no method of betting, money management, or careful observation will make you win every single time. Everyone who have tried it failed. You must not forget that the roulette wheel is completely random.