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
          os.shutdown()
        end
      end
    end
  end
end
compare()
end