How to do my world 24 portal?

There are no 24 entrances in my world, only one entrance, as follows:

Operating tool: vivo X9

Operating system: Funtouch OS 7. 127.

Game: My World v8.2

1. First prepare the portal, and then find an empty place, as shown in the following figure:

2, and then put the portal stones on the ground, as shown in the figure below:

3. The box1* * is 12 doorsill;

4. Then right-click each square of the portal stone with the eye of the last shadow, as shown in the following figure:

5. When the last one is installed, the portal will automatically appear, as shown in the following figure:

6. Jump into the terminal entrance and enter the terminal nothingness world, as shown in the following figure: