function refuel()
  if turtle.getFuelLevel() < 10 then
    turtle.select(1)
    turtle.refuel(1)
  end
end

args = {...}
triangleSize = args[1]

print(triangleSize)

for height=1, triangleSize do
  refuel()
  if not (height == 1) then
    for x=1, (height * 2) - 1 do
      for y=1, (height * 2) - 1 do
        print(tostring(x) .. "," .. tostring(y))
        refuel()
        turtle.forward()
      end
      if (height + x) % 2 == 0 then turtle.turnRight() else turtle.turnLeft() end
      turtle.forward()
      if (height + x) % 2 == 0 then turtle.turnRight() else turtle.turnLeft() end
    end
    turtle.turnLeft()
    if ((1 + height) % 2) == 0 then turtle.turnRight() else turtle.turnLeft() end
  end
  turtle.digUp()
  turtle.up()
  turtle.forward()
  if height % 2 == 0 then turtle.turnRight() else turtle.turnLeft() end
  turtle.forward()
  if height % 2 == 0 then turtle.turnRight() else turtle.turnLeft() end
  if height >= 2 then
    break
  end
end