command /kb <number>:
    usage: /kb [values]
    trigger:
        if arg-1 is set:
            if arg-1 is smaller than 31:
                set {push} to arg-1
                message "&aKB set to %{push}%"
            else:
                message "&cI can`t edge the limit of KB (30 Max)"

on damage of a player:
    if {push} is set:
        push victim in direction of attacker with force {push}

on command "/kb":
   player does not have permission "customknockback.admin.setkb"
   cancel event
   send "&cYou don't have permission! (customknockback.admin.setkb)"