Optical illusions have a way of breaking the internet, and the latest visual trick looks like it’s well on its way. On Sunday afternoon, game developer Will Kerslake tweeted a picture of intersecting gray lines on a white background. Twelve black dots blink in and out of existence where the gray lines meet. In the six hours since he posted the photo to Twitter, it’s been shared more than 6,000 tim
![Here's why you can't see all twelve black dots in this optical illusion](https://cdn-ak-scissors.b.st-hatena.com/image/square/0edad56804e16ad1e84600668a5cf5d90199b298/height=288;version=1;width=512/https%3A%2F%2Fcdn.vox-cdn.com%2Fthumbor%2Frhg83csNYkkChqTGrlqYn_775ls%3D%2F0x0%3A972x687%2F1200x628%2Ffilters%3Afocal%28486x343%3A487x344%29%2Fcdn.vox-cdn.com%2Fuploads%2Fchorus_asset%2Ffile%2F15898981%2FCsG6MSpWAAAdTob.0.0.1473660152.jpeg)