local p = {
    from = {x=31994, y=32446, z=7},
    to = {x=31989, y=32444, z=7}
}

function isCleanAbleArea(pos)
    pos.stackpos = 0
    local tile = getThingfromPos(pos, false)
    if tile ~= 0 and not hasProperty(tile.uid, CONST_PROP_BLOCKSOLID) and not isCreature(getTopCreature(pos).uid) then
        return true
    end
end

function onSay(cid, words, param)
    if words == "!cleanxx" then
    for x = p.from.x, p.topos.x do
        for y = p.from.y, p.to.y do
            for z = p.from.z, p.to.z do
                local c = {x = x, y = y, z = z}
                if isCleanAbleArea(c) then
                    doCleanTile(c, false)
                end
            end
        end
    end
    return true
end