Sleep Tracking App - Sleep graph and Sleep stages, how is it mad

The author has been creating this project for 4 months, redrawing and rethinking the design 4 times from scratch.

Following the news about Apple's sleep tracking app, I started to create my own concept that would reflect the vision of the app. While working on the design, I studied an abundance of scientific articles, given below. Information on the factors that affect sleep is provided from the sources: Sleep Research Society, Oxford Academic, SleepFoundation.org, and others. I wrote scripts in JavaScript to create realistic heart rate data and sleep stages. The "Sleep Tracking App" project is an indicator of the author's principles and approaches. Begin.

The sleep stages report to be realistic, it was necessary to study in detail the sequence of these stages in healthy sleep, then write a special algorithm that generates time intervals for each stage of sleep based on the time of the beginning and end of sleep, the sequence of stages and the total time spent in each stage.

Project on Behance:
https://www.behance.net/gallery/109865487/Sleep-Tracking-App