1.put 3 blocks in a row
2.put a redstone torch on the middle block
3.then put a redstone wire on the rest of the blocks also the block in fron of them
4.then put a block in front of the wires
5.then put a torch on the block just like the picture above
6.put 3 redstone wire in front of the right torch/block
7.put a redstone wire on the left of the left torch/block
8.put a block in front of the wire that you just put not right ok?
9.put 4 wire just like the picture above then put a piston/lamp in front of them
10.do it just like the other side except for the 4 wire stuff just the piston ok?
11.finally put a lever under the torch and done!
ENJOY BUILDING!