for i = 0, 37, 1 do
  for j = 0, 94, 1 do
    while turtle.getFuelLevel() < 1 do
      turtle.refuel()
      os.sleep(0.05)
    end
    while turtle.dig() do
    end
    turtle.forward()
  end
  if i % 2 == 0 then
    turtle.turnLeft()
  else
    turtle.turnRight()
  end
  while turtle.dig() do
  end
  turtle.forward()
  if i % 2 == 0 then
    turtle.turnLeft()
  else
    turtle.turnRight()
  end
end