* Mimicking organic penstrokes in real life
*
* Randomized drawing starts in the upper left hand corner
* towards the lower right hand corner.
*
* L key - Broadens the width of penstroke
* S key - Thins the width of penstroke
* Up / Down arrow - accelerates / slows speed of the movement
* Esc - Closes window
*
* Reference
*
* Processing: A Programming Handbook for Visual Designers and Artists
*
* pg 37-41, 105-107 - int and float functions
* pg 69-72 - Shape: Vertices
* pg 233-234 - KeyPressed
* pg 369-370 - Saving Sequential Images, Making Screenshot
*
*