How to make my world red?

1. Dig a pit about 2X high, 3x wide and 2x2 long. As shown in the figure

2. Dig a grid next to the pit of this geometric figure. As shown in the figure

3. Put a red stone line on a two-grid-deep figure. As shown in the figure

4. Take out the same square as the nearby square and cover it.

5. Put red stone torches on both pits. As shown in the figure

6. Put a square and a red stone on the pit.

7. Put two viscous pistons on each side in the middle and put them above. As shown in the figure

8. Finally, put a pressure plate next to the square that has just been placed. If it is hidden, it is necessary to make a square with the same building materials, and the red stone door is completed.