The game of roulette is normally played with an elongated table. At one end is the roulette wheel, with a notch in the table for the dealer to stand at. The table is covered with a felt layout with boxes numbered from 1 to 36 arranged in three columns of twelve rows. At the end of the portion of the layout that is closest 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 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 side of the rectangle away from the dealer are boxes for bets on each 12-number column.
The wheel itself has 38 numbered slots, each with the same colored background as the corresponding number on the table layout. The roulette ball used to be made from ivory; now it is most of the time made with plastic. The dealer spins the wheel in one direction, and throws the ball in the opposite 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 in a numbered slot.
Roulette is solely a game of chance, and no way of betting, money management, or careful observation can help you win every single time. Many have tried it, and many have failed. You must remember that the roulette wheel is 100% random.