Nothing (nothing.tech) is making phones with programmable LED lights on the back. They call it "Glyph Interface" and there is a bunch of ringtones preinstalled. Nothing also made an app called Glyph Composer, which allows users to create new ringtones, but the options are quite limited. Users have figured out a way to create custom ringtones and started making popular songs with matching lights.

Glyphtones is a platform, where people can either share their compositions, or find those they like.