Hello, Im woundering if someone could help me with this? I want to build a garage door indicator so I know if the door is open or closed. Im new to building circuits so I dont really know alot so I need to know what materials to purchase. Anway I was thinking a red LED to show the door is open and on the door use a magnetic switch and when the switch touches when open then the light would light up. I would run this off an small 9 Volt battery possibly. But I would like to have a green status indicator if the door is closed but im not even sure how that could be done. Thanks!