Coal refueler (Coal ammount readers)

rednet.open("left")
chest = peripheral.wrap("front")

while true do
    print("Transfering coal...")
    for i=1,16,1 do
        turtle.select(i)
        turtle.suck() end
    print("Counting coal...")
    local currently_counted
        currently_counted =0
    local total_counted
        total_counted =0
    for j=1,16,1 do
        currently_counted = currently_counted + turtle.getItemCount(j)
        total_counted = total_counted + turtle.getItemCount(j) end
    print("Counted", total_counted, "coal")
    print("Returning coal...")
    for i=1,16,1 do
        turtle.select(i)
        turtle.drop() end

    if currently_counted < 192 then
        rednet.send(14, "Send more coal!")
        print("requesting more coal!")
             end
    sleep(1200)
    end