It doesnt’ work 
I used this tutorial http://slideplayer.com/slide/4774306/. When the red light appears, ‘a’ should be pressed whereas when the blue light appears there should be no response.
It doesnt’ work I used this tutorial http://slideplayer.com/slide/4774306/. When the red light appears, ‘a’ should be pressed whereas when the blue light appears there should be no response.