Sticky Pistons and Pistons stay extended when powered above.
- Create a device where redstone is above a piston (Use image below as reference)
- Make sure the piston next to the first piston does not have redstone ontop of it
- Activate redstone (Pistons should extend)
- De-activate pistons
- Pistons won't de-extend
Note: If a block is put next to the extended pistons they will update and revert back to there normal status.