Ore craft

local amount = 0
local perDown = peripheral.wrap("bottom")
while true do
    for i=1,18 do
        numItems = perDown.getStackInSlot(i)['qty']
        sleep(0.1)
        if numItems > 5 then
            transferNum = (numItems - 1) / 4
            perDown.pushItemIntoSlot("up", i, transferNum, 1)
            perDown.pushItemIntoSlot("up", i, transferNum, 2)
            perDown.pushItemIntoSlot("up", i, transferNum, 5)
            perDown.pushItemIntoSlot("up", i, transferNum, 6)
            turtle.select(16)
            turtle.craft()
            while turtle.getItemCount(16) > 0 do
                turtle.dropUp()
                sleep(1)
            end
        end
    end
end