Ok have you ever tryed to make a double door in minecraft you know i wont work.
I'll make another instructable when i get at least one comment.
Step 1: Why It Wont Work
Step 2: Make It Work
We need to make a inverter to one door.
Look at my other instuctable "mine craft repeaters"
Step 3: Make It Pretty
make i pretty. the door stayed oped when i changed the lever for pressure pads so i re inverted both sides