Turtle - Tree Farm Return

-- This little program sends the turtle
-- back to the treefarm starting point
-- and restarts the treefarm program
-- if the tree farm program aborts
-- while the turtle is at the dirt block.
-- No variables needed.

function goForward(n)
  for i=1,n do
    turtle.forward()
  end
end

function Return()
  turtle.turnLeft()
  goForward(5)
  turtle.turnRight()
  goForward(5)
end

turtle.down()
turtle.dig()

for i=1,1 do
  Return()
end

turtle.turnLeft()
turtle.turnLeft()

-- This section restarts the treefarm for you.
shell.run("treefarm")