Its a simple gate for castles or there walls. All you have to do is flip the lever on and off. You MUST have 2 spaces below the whole thing 1 for the floor and the 2nd for the mechanics feel free to play around with it and by all means you can replace all the blocks with what ever you want for what ever look.

You MUST have the following mods for this to work right:

Wireless Redstone: http://www.minecraftforum.net/topic/328725-166wireless-redstone-v13/
Better Blocks: http://www.minecraftforum.net/topic/256156-166-june-4-betterblocks-35-bridges-more-fixes/