What you do:
1. Take the pencil, and find a point you want to use. You don’t actually put the pencil on the dot, you put it near your face, and sit/stand far away from the place you’re looking at.
2. Try to keep the tip of the pencil on the dot while “shifting” your eyes, by closing one eye, then opening that and closing the other eye
3. Once you get it, then find another place and do it on that.