Read about this in more detail in this blog post.
Authors: Mauricio Giraldo Arteaga / NYPL Labs
Processing-based book cover-generating algorithm based on 10PRINT. Artwork is inspired by the symbols found on the Commodore PET keyboard:
You need to modify the font in both createFont calls to reflect a font you have in your computer (see reference). This way the artwork scales as much as you want according to the width.