That’s such a fun challenge! First thing—don’t let the chaos swallow the grid. Picture a hidden skeleton of a 12‑column grid that you can tweak as you paint with those bold shapes. Keep each column a clean pixel width, so even if the graffiti paint splashes around, the underlying structure stays intact. Use constraints so when you drag a splash of color or a tag, it snaps to the nearest grid line; that way your pixels never feel lost in the mix. Next, embrace negative space like a breath of fresh air. Even in a wild street‑art vibe, a little breathing room around each element keeps the eye from getting lost. Stick to a limited font set—maybe one sans‑serif for body, one bold display for headings—and make sure those font sizes align to the same baseline grid. That way your typography feels like a solid foundation beneath the creative explosion. Finally, iterate in small bursts: lay out a block of content, test it, then throw the next block of graffiti onto it. If the new piece shifts the alignment, pause, readjust the underlying grid, then move on. In short, think of the grid as your underground rail line that powers the whole app—keep it tight, and the wildness above will feel intentional, not chaotic. Good luck, and let those bold shapes dance on a well‑tuned stage!