On the player spawn diamond, either don't end the process, or create a new one with emeralds. In it, place a loop containing a wait command which waits until that one player... satisfies a condition. You have to use the not arrow.
On the player spawn diamond, either don't end the process, or create a new one with emeralds. In it, place a loop containing a wait command which waits until that one player... satisfies a condition. You have to use the not arrow.