A T Flip Flop is a minecraft switch that allows a button to effectively become a lever without the 'locking' aspect of it. It's a fairly simple circuit that works well.
Step 1. Dig one block down and put a redstone torch in it
Step 2. Put a normal piston in each of the marked places bellow
Step 3. Place the blocks in the marked spaces (These can be any blocks within reason) as long as you can place redstone and torches...
