--15x65

local arg = ...
local lw = {15, 64}
local itlw = {0, 0}
local blockDetected = false
local offRow = false

if arg == "scan" then
    local file = fs.open("data.txt", "r")
    itlw[1] = tonumber(file.readLine() or 0)
    itlw[2] = tonumber(file.readLine() or 0)
    file.close()
end





turtle.select(1)
for i = itlw[1], lw[2] do
    for j = itlw[2], lw[1] do
        if turtle.getItemCount() == 0 then
            if turtle.getSelectedSlot() == 16 then
                local cFile = fs.open("data.txt", "w")
                cFile.writeLine(tostring(j))
                cFile.writeLine(tostring(i))
                cFile.close()
                os.reboot()
            end
            turtle.select(turtle.getSelectedSlot() + 1)
        else
        turtle.forward()
        turtle.placeDown()
        end
    end
    if offRow and turtle.getSelectedSlot() ~= 16 then
        turtle.turnLeft()
        turtle.forward()
        turtle.placeDown()
        turtle.turnLeft()
        offRow = false
    elseif not offRow and turtle.getSelectedSlot() ~= 16 then
        turtle.turnRight()
        turtle.forward()
        turtle.placeDown()
        turtle.turnRight()
        offRow = true
    end

end