Circuit

print("Starting circuit...")
while true do
turtle.select(1)

function compare()
  if turtle.compareDown() == true then
    turtle.forward()
  else
    turtle.select(2)
    if turtle.compareDown() == true then
      turtle.turnLeft()
      turtle.forward()
    else
      turtle.select(3)
      if turtle.compareDown() == true then
        turtle.turnRight()
        turtle.forward()
      else
        turtle.select(4)
        if turtle.compareDown() == true then
          turtle.turnRight()
          turtle.turnRight()
          turtle.forward()
        else
	  turtle.select(5)
	  if turtle.compare() == true then
	    turtle.up()
	    turtle.forward()
	  else
	    if turtle.detect() == true then
	      turtle.up()
	    else
	      if turtle.detect() == false and turtle.detectDown() == false then
		turtle.down()
	      else
		if turtle.compareDown() == true then
		  turtle.forward()
		else
		turtle.select(6)
		  if turtle.compareDown() == true then
		    turtle.forward()
		    turtle.down()
		  else
          	    os.shutdown()
		  end
		end
	      end
	    end
	  end
        end
      end
    end
  end
end
compare()
end