torch key piston door

i had been working on this system before but it sucked i had to manually reset by breaking the redstone torch to close the door but i saw a video right before i did this about the "useless machine" which allowed it to automatically reset so i uploaded its rather large so its best for cliff doors but it can be hooked up to any door you want to it doesnt even have to be next to the door ill make a tut once i can get my software to work it its my first upload im a redstone genius so there are sure to be more uploads from me though enjoy

Additional Notes

to work the system place a redstone torch on bottom of the inner block of the hole in the wall