Delay specified as TimeInterval enables user to delay start of animation, it was possible to call start() with asyncAfter but in case of applicationWillBecomeActive all animations would reset and start at the same time.

Removed most of the constraints and inserted various horizontal StackViews inside vertical StackView for better readability and easier modifications. Also inserted delay slider to check new feature. That works via turning off and then on the switch or minimizing app and then opening again.