Scan your eyes across the grid of grey lines with white dots at intersections. Why do black dots flash erratically at intersections you are NOT looking at?
💬 How many black dots can you catch at the same time? (Hint: impossible!) (Solution in first comment 👇)
Look across the black grid with white streets. Notice the faint grey ghostly smudges that appear at the intersections, but vanish the moment you look directly at them?
💬 Try counting the grey dots! Can you ever catch one looking straight at it? (Solution in first comment 👇)