Stepping away is part of the game. Stretch, grab some water and come back stronger.
Once you're in, hold down anywhere on the screen to customize it and turn on music.
Tip: To leave it running full time, turn on Guided Access (Settings > Accessibility > Guided Access) and set its Display Auto-Lock to Never. Open GoPlay AFKs, then triple-click the side button to lock your screen to it. Keep your phone charging.
Tip: To leave it running full time, turn on app pinning (search "pin" in Settings). Open GoPlay AFKs, then pin your browser from the recent apps screen. Keep your phone charging.
Tip: Macs don't have Guided Access, but this page keeps your display awake while GoPlay AFKs is open. Plug in, go full screen and let it run.
Tip: This page keeps your display awake while GoPlay AFKs is open, so it can run all day while you're plugged in.