[nrjames]

This is easy to do with p5.js. You create a canvas at whatever size you want to print and draw to that canvas. Each frame, you take an image of the canvas and show it on screen in the browser. Wire up a key to save the full-sized canvas out to a PDF or PNG (or whatever) when you're ready to export for print. It's done very commonly by generative artists. There are several other ways to handle similar issues, too.