In this step-by-step drawing lesson, you will learn how to draw a cartoon door using squares, rectangles and a couple of lines! This tutorial is probably the easiest one available on this site!
Achieving all lights and shadows effect might be a little bit harder if you don't own a vector software, but with a good set of pencils and lots of perseverance, it certainly can be done!
Don't hesitate to customize your door to create new patterns on it! There are many possibilities and each of you can easily create a door that is different and original! Enjoy!