Perspective frame

Wanna learn to draw? Got no talent? Then this is for you. Transform 3D objects to 2D plane is complicated. I do not guarantee you, you will paint like Monet or van Gogh, but the device really works.
It is not my invention, actually, it was used 600 years ago (and may be even before):
http://www.npg.org.uk/learning/digital/portraiture/perspective-seeing-where-you-stand/the-drawing-machine.php
Even such genius like Vincent van Gogh used an alternation of this device
http://www.vangoghreproduc