The rules are simple: Count to 300 but DO NOT say the number 4, if 4 is the next number, you must skip it. If someone says "4", you have to restart the game.
For example:
-User 1: 3
-User 2: 5
-User 1: 13
-User 2: 15
-User 1: 39
-User 2: 50
Let's go!