Wildgrowth with ava/sd rune

Code:

---

init start
        local WildGrowth = 2130 -- id of rush wood
        local shootPosx = $posx -- This is east
        local shootPosy = $posy+1 -- This is north
init end

auto(200)
if topitem(shootPosx, shootPosy, $posz).id ~= WildGrowth and itemcount("wild growth rune") > 0 then
setsetting('Persistent/Scripts/Runeshooter/Enabled', 'no')
        useitemon("Wild Growth Rune", 0, ground(shootPosx, shootPosy, $posz))
        wait(300,500)
else
setsetting('Persistent/Scripts/Runeshooter/Enabled', 'yes')
end

---

Will this work? The idea is to stop use avalanche rune if the item south from you isn't a wildgrowth