How do you create an animated glow effect around floor sprites or sprite objects?

I've seen this commonly in RPG Maker games where collectable/interactive items have a glowing animation effect around them. How would I do this for RPG Paper Maker 3.045?

You could use a special stop animation for it (but only 4 frames depending on what you have for your game), or use show animation command to a time event that triggers every few seconds to loop it.