Drawing with Graphite Pencil - Round Hole Illusion - Trick Art on paper for Kids & Adults

How to draw round hole. Drawing 3D hole with pencil. Optical illusion on paper. Cool anamorphic illusion for kids and adults.
• Material used:
Paper: A/4, white.(Fabriano Elle Erre 220 g.)
STABILO graphite pencil HB.
Plastic rulers.
Kneaded eraser.
♪ Music:
1. Medium Rock by Audionautix is licensed under a Creative Commons Attribution license
(https://creativecommons.org/licenses/...)
Artist: http://audionautix.com/ /
2. Hackbeat by Kevin MacLeod is licensed under a Creative Commons Attribution license
(https://creativecommons.org/licenses/...)
Source: http://incompetech.com/music/royalty-...
Artist: http://incompetech.com/ /
3. 5 Cents Back by Audionautix is licensed under a Creative Commons Attribution license
(https://creativecommons.org/licenses/...)
Artist: http://audionautix.com/ /
By Sandor Vamos. I'm Hungarian.
Copyright © New video 2017. Vamos. All rights reserved.