I have seen a lot of optical illusions. I have a reasonable layman's understanding of how they work

I have stared at this for five full minutes trying to get it NOT to flip every 10-15 seconds and I cannot keep it from doing so

[Also, I have no idea how to write alt text for this]

https://media.mas.to/masto-public/media_attachments/files/111/190/777/253/450/924/original/16c60799b395d0f8.jpg