But then there are people like Reddit user skrillexisokay, who decided to get creative with their spider-webbed iPhone and use colored highlighters to enhance the natural breaks:
Just draw all over the back with a highlighter and rub the excess ink off with a paper towel. The ink will stay in the cracks, but rub off the rest of the back. [To avoid] dangerous glass shards or ink rubbing off, cover with one piece of clear packing tape or something similar, like clear nail polish.
Of course, we feel compelled to mention that repairing the front or back glass on your iPhone is easy and inexpensive. But if you don't want to get into DIY repairs, this is a quick aesthetic fix with a cool and unique result.