" You will need 12 index cards and the pen/pencil of your choice. Draw one panel per card, spending no more than 3–4 minutes per card. Do not use any words. Draw the following scenarios: (A) The beginning of the world; (B) The end of the world; (C) A self-portrait, including your entire body; (D) Something that happened at lunchtime (or breakfast, if it’s still morning); (E) An image from a dream you had recently; (F) Something that happened in the middle of the world’s existence, i.e., between drawings A and B; (G) What happened right after that?; (H) Something that happened early this morning; (I) Something that has yet to happen; (J) Pick any of the above panels and draw something that happened immediately afterward; (K) Draw a “riff” on panel J; for example, a different perspective, another character’s viewpoint, something that happened off-panel, or a close-up on some detail or aspect of the drawing; (L) Finally, draw something that has absolutely nothing to do with anything else you have drawn in the other panels. Spread the 12 panels out in front of you. Try to create a comic strip by choosing 4 of the panels in any order. "
― Ivan Brunetti , Cartooning: Philosophy and Practice