turtle.refuel()
    while true do
            i = 0
        while i < 30
            turtle.select(2)
              while turtle.compare() == true do
                 turtle.dig()
                 sleep(2)
              end
                turtle.dig()
                turtle.digUp()
                turtle.forward()
            i= i+1

        end
        turtle.turnRight()
        turtle.dig()
        turtle.digUp()
        turtle.forward()
        turtle.dig()
        turtle.digUp()
        turtle.forward()
        turtle.dig()
        turtle.digUp()
        turtle.forward()
        turtle.turnRight()
        i = 0
          while i < 30 do
                turtle.select(2)

              while turtle.compare() == true do
                 turtle.dig()
                 sleep(2)
              end
                turtle.dig()
                turtle.digUp()
                turtle.forward()
            i= i+1

          end
        turtle.turnLeft()
        turtle.dig()
        turtle.digUp()
        turtle.forward()
        turtle.dig()
        turtle.digUp()
        turtle.forward()
        turtle.dig()
        turtle.digUp()
        turtle.forward()
        turtle.turnLeft()

    end