TurtleRoad

function CheckFuel()
  if turtle.getFuelLevel() < 50 then
    print("Refueling...")
    for i=1,16 do
      turtle.select(i)
      if turtle.refuel(1) then
        break
      end
    end
    turtle.select(1)
  end
end

function Dig()
  if turtle.detect() then
    turtle.dig()
  end
  turtle.attack()
end

function Forward()
  attempts = 0
  if turtle.detect() then
    while turtle.dig() and attempts < 20 do
      attempts = attempts + 1
      sleep(0.25)
    end
    turtle.attack()
    turtle.forward()
  end
end

function MoveUp()
  attempts = 0
  if turtle.detectUp() then
    while turtle.digUp() and attempts < 20 do
      attempts = attempts + 1
      sleep(0.25)
    end
    turtle.up()
  end
end

function MineRoad()
  turtle.turnRight()
  Dig()
  Forward()
  Dig()
  Forward()
  Dig()
  Forward()
  turtle.turnLeft()
  turtle.turnLeft()
  MoveUp()
  Dig()
  Forward()
  Dig()
  Forward()
  Dig()
  Forward()
  turtle.turnRight()
  turtle.turnRight()
  MoveUp()
  Dig()
  Forward()
  Dig()
  Forward()
  Dig()
  Forward()
  turtle.turnLeft()
  turtle.turnLeft()
  MoveUp()
  Dig()
  Forward()
  Dig()
  Forward()
  Dig()
  Forward()
  turtle.turnRight()
end

function Return()
  turtle.down()
  turtle.down()
  turtle.down()
end

print("Starting...")
CheckFuel()
for i = 1,100 do
  CheckFuel()
  MineRoad()
  Return()
  Forward()
end
print("Stopping!")