I have a stack of old business cards with the blank side filled with hand-drawn "writing parts". I use them as flash cards.
A number of cards was randomly drawn. In this case, I picked 5.
The "writing parts" on these cards formed the "seeds" to "grow" the drawing. They were applied to the drawing in the order that they were drawn from the stack.
What eventually got put into the drawing was not limited to the selected cards. These cards merely served as a device to get the drawing going. How the drawing evolves and finishes depended more on how the mind - and the hands - respond to the drawing in progress. Below is the finished drawing.