This is my first optical illusion and it's made by myself. I hope it worked. 

Exo-K Baekhyun

What you need to do to make this optical illusion work is:

1. Stare at the red dot in the middle for 30 seconds. Only stare at the red dot!!!

2. Immediately look at a white wall, white ceiling, or a white blank piece of paper and start blinking. 

Lol XD