This demo shows a simple recursive animated cube. Aside from stealing hours of staring at it, the code can showcase a few concepts:

• Creating multiple froggy::Storage containers and processing them on the same thread.
• Working with a scene graph mapped to froggy.
• Drawing fancy cubes with gfx-rs instancing. It uses glutin/GL and even handles resizing properly.
• Composing cgmath::Decomposed transforms and working with quaternions in the shaders.