Redsone lock

so basically you need to know how to turn off redstone torch's if you don't then heres how you put a block any block that you can put a redstone torch on on one side you put a redstone torch and the other redstone and when ever you turn on the redstone the torch goes off. So you put 2 blocks down on your roof (make sure your roof is big enuff) with a three block space in the middle put one peace of redstone in the middle and a redstone torch on each block so that it is turning on the redstone then on the other side of the blocks that have the redstone torch put a peace of redstone side the lead one to your button and one the the lever on the inside of your house and the lever locks and unlocks your door the button opens your door if you don't understand tell me what you don't understand and ill upload a picture of it to explain