How to make invisible squares in mini-world?

Creating a pattern uses an air wall, and it is invisible to turn to survival.

The specific operation method is as follows:

1. First, put two squares in the target position.

2. Install the push-pull manipulator on the side of the square, and pay attention to the direction.

3. On the other side of the push-pull manipulator, put two squares beside the push-pull manipulator. Leave two spaces and do the same on the opposite side.

4. Go back to the original position, punch through two underground floors, and then put a square to install the electric energy generator.

5. Knock out the top box, then punch through the box and the box below the push-pull arm, and make two more squares (both with a depth of 2) at the entrance and exit of the secret door, and connect them with blue lines.

6. Fill all the places on the ground that can be filled with squares, and then put two pressure pedals at the entrance and exit respectively.