#経験値回復
every seconds:
	loop all players:
		level of loop-player is less than 20
		if loop-player is sneaking:
			the block below loop-player is not air
			add 0.5 to level progress of loop-player
		add 0.05 to level progress of loop-player

on respawn:
	level of player is less than 20
	wait 1 tick
	set level of player to 20