Here's a demo showing a basic color picker using a container with 4 states for both the colored star and the color swatches.

Designers can use their favorite design tools like Photoshop and Sketch to design the finest details of the user interface for their app. Single or multiple touch interactions can be applied on any UI element (layer) on each screen. Sophisticated animations can be created on-screen as well as screen transitions, using the powerful timeline animation features that Proto.io offers.

This is a prototype for a café discovery service that I'm developing and it is purely for idea conceptualization purposes only! Please leave comments and let me know what you think!