Now in isolation this looks a little suspicious,. Seven dots forming a perfect V shape. But look around at the surrounding area, look at all the vertical and horizontal areas. Notice how they all line up in a grid.
What we are seeing here are individual pixels from a low resolution image, which have been greatly enlarged and filtered in a way that gives this grid-like effect. All it took was a few pixels in the right place to give this effect.
But it's a little more complex than that. These pixels don't even appear in the original image.
Look at the image closer to its original resolution by zooming out: