state()

"state" will automatically execute every 500ms when the tile is visible and updates the content of the script's tile. MDI icons are supported here (e.g. mdi:airplane). A full list of icons is available here: https://pictogrammers.github.io/@mdi/font/6.9.96/

state(() => {
  return 'mdi:lightbulb-on:Overlayed Text';
});