This is a library which was influenced by the loading/prograss bar in Overwatch.
If you want to use this, you can simple copy the class HexagonLoadingView to your project, include it in your XML file and call it a day.
If you want more fine grained control over the animations, colors and durations, just take a closer look at that class.
For example, if you want the whole animation to be faster, just change the variable APPEARANCE_SPEED_COEFFICIENT to a lower number.
Any help to improve the animations and make them smoother is appreciated.