else error skript spacing

[1slo]

command /dupe:
    trigger:
        set {_item} to player's tool
        if {_item} is air:
        send "test" to player
        else:
        drop {_item} at player
        set {currentpos} to player's location
        play sound "block.anvil.place" at volume 1 at pitch 2 to player
    
 

i get an error that says else has to be place under if or else if blah blah blah, i know its do with spacing