Lua Animate dead in area

[goesraphael]

Hello, when I use the rune Animate Dead in a minotaur corpse for example, it only make 1 skeleton even if have more than 1 dead minotaur around, but the rune should work in area to summon more than 1 skeleton if there are more than 1 minotaur corpse, anyone can help me change this script to be in area and summon more than 1 skell at time?

local function doTargetCorpse(cid, position)
    position.stackpos = 255
    local corpse = getThingFromPos(position)
    if(corpse.uid > 0 and isCorpse(corpse.uid) and isMoveable(corpse.uid) and getCreatureSkullType(cid) ~= SKULL_BLACK) then
        doRemoveItem(corpse.uid)
        doConvinceCreature(cid, doCreateMonster("Skeleton", position))

        doSendMagicEffect(position, CONST_ME_MAGIC_BLUE)
        return true
    end

    doSendMagicEffect(getThingPosition(cid), CONST_ME_POFF)
    doPlayerSendDefaultCancel(cid, RETURNVALUE_NOTPOSSIBLE)
    return false
end

function onCastSpell(cid, var)
    local position = variantToPosition(var)
    if(position.x ~= 0 and position.y ~= 0) then
        return doTargetCorpse(cid, position)
    end

    doSendMagicEffect(getThingPosition(cid), CONST_ME_POFF)
    doPlayerSendDefaultCancel(cid, RETURNVALUE_NOTPOSSIBLE)
    return false
end