local x,y = nil

local args = {...}

x = toNumber(args[0])
y = toNumber(args[1])

print("Doing a " ..x .." by "  ..y)

function calcFuel()
    local fuel = (x*y)+y
    local hasFuel = false
    while not hasFuel do
        if turtle.getFuelLevel() < fuel then
            print("Fuel is to low to do that! Please give me more Fuel!")
            print("Insert Fuel and wait 5 secs!")
            sleep(5)
            local i
            for i = 1, 16 do
                turtle.select(i)
                turtle.refuel()
                i=i+1
            end
            turtle.select(1)
        else
            print("Got enough fuel for that!")
            turtle.select(1)
        end
    end
end

function tryForward()
  while not turtle.forward() do
    turtle.dig()
  end
end

function goPlace()
  turtle.placeDown()
  tryForward()
end

function collum()
  local i = 0
  while i<x do
    goPlace()
    i=i+1
  end
end

function rows()
  local j = 1
  local turn = false
  while j < y do
    collum()
    if turn then
      turtle.turnLeft()
      tryForward()
      turtle.turtle.turnLeft()
    else
      turtle.turnRight()
      tryForward()
      turtle.turnRight()
    end
    j=j+1
  end
end

calcFuel()
turtle.turnLeft()
rows()