Since each spin is independent, past outcomes have no bearing on subsequent spins. The allure of slot machines lies in their randomness; regardless of skill level, every player hasslots of fun an equal chance to win. Reels, symbols, paylines, and a payout structure are the fundamental parts of a slot machine. When a player activates the machine, reels spin. If the symbols line up in a winning combination along a payline, the player is paid according to the machine's preset odds. Slot machines have changed a lot since their mechanical forerunners.