How does WeChat make a heart-shaped pattern with words?

Imagine the outline of the pattern to be spelled out in your mind with spaces and letters (numbers or words), and then display the outline alternately with spaces and letters (words or numbers). This is the desired pattern.

Just enter the following words in the input box for the heart-shaped pattern:

aa aa

aa aa aa？ alcoholic anonymous

aa aa？ alcoholic anonymous

aa？ alcoholic anonymous

aa？ alcoholic anonymous

aa aa

alcoholic anonymous

This is a heart-shaped pattern.

Extended data:

Wechat is a free application launched by Tencent on 201110, which provides instant messaging service for intelligent terminals. It was created by the product team of Tencent Guangzhou R&D Center led by Zhang Xiaolong.

Wechat supports fast sending of free voice messages, videos, pictures and texts across communication operators and operating system platforms. At the same time, you can also use service plug-ins such as "shake", "drift bottle", "circle of friends", "public platform" and "voice notepad" to enjoy streaming media content through * *.

References:

Wechat-Baidu Encyclopedia