You are using the Left or Right brain to think about it. Please test it.

A picture sent from a friend is said to be able to analyze the use of people's left and right brains.
From a developer's professional perspective, I think this is a funny prank, because GIF is just a switching of image frames.

However, while I was avoiding the direct view, I thought from a distance and found that the rotation had changed. When I typed this text, I found that the image sometimes turned left, sometimes turned right, and there was no fixed interval, it is true that my thinking is changing.

So I am sure that this GIF image is definitely not set to rotate back and forth, it is the role of the brain.
A long time ago, I have seen many cases of human brain spoofing, indicating that the information provided by the brain is not always reliable. You should also have seen it, so follow up and accumulate, ^_^

Welcome to the test!