How does WeChat make roses float all over the screen?

The method of floating roses on WeChat full screen is as follows:

Operating environment: iphone 12, ios 15.2, wechat 8.0. 16, etc.

1. Open WeChat to find your friend who wants to send roses, and click the chat box.

2. Click the keyboard and it will pop up. Enter the keyword "Rose". At this time, a rose will appear on the screen. Click.

3. Slide to the left. There are x50 roses here. Click once and you will add 50 roses. You need to click 20 times.

4. Click 20 times and there will be 1000 roses, with one at the beginning, so there are 100 1 roses in the chat box at present, and two roses should be deleted.

5. Click Send after deletion.