How to make a red stone door in my world

My world Red Stone Gate practice is as follows:

Operating equipment: Lenovo pad2023. 1.

Operating software: My World 3.4.

Operating system: win 1 1 ultimate edition.

1, dig such a hole.

2. Put red stone torches on both pits.

Put a square and a red stone on the pit.

4. Put two viscous pistons in the middle and one upper piston on each side.

5. Finally, put a pressure plate next to the square just put away. If it is hidden, it is necessary to make a square with the same building materials, and the red stone door is completed.