The server translates the number into a position on the reel and stops the reel there.The RNG generates a random number and sends it back to the server.The Casino list has a server-based system that randomizes the symbols that appear on the reels for each player.If the number corresponds to a winning combination, the player wins. The player presses the spin button, and the RNG generates a number.The following is a list of the most common slot layouts and their programming rules. There is no pattern to the numbers that the RNG generates, so it is impossible to predict when the machine will payout. The RNG is what determines where the reels will stop, and it is entirely random. Slot machines are programmed with a random number generator (RNG), a computer program that randomly generates numbers. 4 Responsible Gaming The key to winning on slot machines is understanding how they are programmed.