I made this skript and he dosen't work for me

[SuccoDiFrutta]

on pressure plate:
  if event-block's location = location at 4, 161, 9 in world "world":
    give 1 diamond to player

[CollinUpp]

Hey, I hope this is what you want.

on place of oak pressure plate:
    set {pressureplateloc} to location of event-block
    send "&e&lLOCATION &7| &6Location set" to player
on pressure plate:
    if {pressureplateloc} is set:
        give player 1 diamond
        send "&c&lHey&7, you've got 1 diamond!" to player
on break of oak pressure plate:
    delete {pressureplateloc}
    send "&e&lLOCATION &7| &6Location unset" to player