Von Houskeeper: Use a transistor as a switch with a resistor from the supply to the base and the LED in the collector along with a resistor to the supply. Now put the relay contact from the base to the emitter. When the drawer is closed and the contact closes, the transistor will turn off.
Sharee Doak: You should look for a schematic drawing software. Look it up on google. I found one thats pretty good; http://www.expresspcb.com/ExpressPCBHtm/Download.h... It is free, too.
Nona Lentini: Try LTSPICEIts a software I'm using in my Engineering classes and its free to download.Although I'm not really too sure how technical you want your circuit drawing software to be....
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