1. According to the number of competitors, determine the rounds of the competition. For example, if two people play a game, they can design 1 round; Four people can play a game and design two rounds.
2. Number each player according to the determined number of rounds. For example, the first round can be numbered 1 ~ 2, and the second round can be numbered 3 ~ 4.
3. Draw lots by numbers. For example, player 1 plays the first round with player 2; Players No.3 and No.4 play the first round; Two winners enter the second round, and so on.
The above are the basic steps of drawing lots in billiards competition. I hope it will help you.