Skript

command /warn [<player>] [<text>]:
    permission: skybound.warn
    permission message: &8[&cSkybound&8] &7You don't have permission!
    trigger:
        if arg-1 is set:
            if arg-2 is set:
                add 1 to {warns.%arg-1%}
                broadcast " "
                broadcast "&a%player% &7has warned &a%arg-1% for &a%arg-2% &8(&7%{warns.%arg-1%}%&8/&73&8)"
                broadcast " "
				if {warns.%arg-1%} is 3:
					set {mtimer.%arg-1} to 900
        else:
            message "&8[&aSkybound&8] &7Use /warn (player) (reason)"
on chat:
    if {mute.%player%} is true:
        cancel event
        send "&8[&aSkybound&8] &7You are muted!"
ever second:
	loop all players:
		if {mtimer.%player%} is not 0:
			remove 1 from {mtimer.%player%}
		if {mtimer.%player%} is 0:
			set {mute.%player%} to 0