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

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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!

My own version of the Pandora Taylor Swift example provided by Proto.io's video tutorial.

If you need to get the Y position of a vertically scrolling container, create a text box. Then on the container scroll trigger, set a variable that evaluates the numerical callback value from the event (Y position). Then add a callback that changes the text property of the text box by reading from the variable.