Watering Can 0.3.6

[oliverpadron86]

function onUse(cid, item, fromPosition, itemEx, toPosition)
if (itemEx.itemid == 3984) then
doTransformItem(itemEx.uid, 3985)
doSendMagicEffect(toPosition, 5)
return true
elseif (itemEx.itemid == 2781) then
doTransformItem(itemEx.uid, 2782)
doSendMagicEffect(toPosition, 5)
return true
elseif (itemEx.itemid == 2737) or (itemEx.itemid == 2738) then
doTransformItem(itemEx.uid, 2739)
doSendMagicEffect(toPosition, 5)
return true
elseif (itemEx.itemid == 5463) or (itemEx.itemid == 5464) then
doTransformItem(itemEx.uid, 5466)
doSendMagicEffect(toPosition, 5)
return true
else
doPlayerSendCancel(cid, "You cannot use the watering can with this!")
end
return true
end

How i can make this works when a player/monster is above the cut grass