Tiny Redstone Door can be operated from both sides by placing levers on both sides. Pull the lever down to open and then pull it back to close the door.
This guide will explain to you the method to make a Tiny Redstone Door.
In order to make a Tiny Redstone Door, place six pistons on the ground in the same way as shown in the image below.
The next thing you need to do is to place gray concrete blocks at the top of these pistons. Add a redstone repeater at the top of the center concrete block and use redstone dust on the remaining ones. And set the redstone repeater to two tick delay.
Fill up all the gaps at right and back sides by placing gray concrete blocks. And place a lever on the front side.
Add another lever at the back side. Pull the lever down to close the door and pull it back in order to open the door.