turtle.dig()
turtle.forward()
z=0
  turtle.dig()
repeat
  turtle.digUp()
  turtle.up()
  turtle.dig()
  z=z+1
until turtle.detectUp()==false

turtle.turnRight()
turtle.dig()
turtle.forward()
turtle.turnLeft()

turtle.dig()

for i=1,z do
  turtle.digDown()
  turtle.down()
  turtle.dig()
end

turtle.turnLeft()
turtle.forward()
turtle.turnLeft()
turtle.forward()
turtle.turnRight()
turtle.turnRight()