Minecraft Bedrock fast 4×4 Piston Door Tutorial

There are actually many different designs for 4×4 piston doors. This particular 4×4 piston door has hit the theoretical maximum speed possible for this layout, which is why I call it the fastest 4×4 door though it is only the fastest within this specific layout style by LiDaShiNB open 1.5s clos 0.7s