defaultbars.js

/***************************************************************
 * This has been deprecated and does not support lancer 1.0.0+ *
 ***************************************************************/

// Bar Brawl Default Config
Hooks.on("preCreateToken", function(_scene, data) {
  const actor = game.actors.get(data.actorId);
  data.flags.barbrawl = data.flags.barbrawl ?? {};
  const token_bars = data.flags.barbrawl?.resourceBars ?? {};
  let def_bars = {};

  switch (actor.data.type) {
    case "deployable":
      def_bars = {
        "bar1": {
          id: "bar1",
          mincolor: "#FF0000",
          maxcolor: "#80FF00",
          position: "bottom-inner",
          attribute: "hp",
          visibility: CONST.TOKEN_DISPLAY_MODES.HOVER
        }
      }
      break;
    case "pilot":
    case "npc":
      def_bars = {
        "bar1": {
          id: "bar1",
          ignoreMax: false,
          ignoreMin: true,
          mincolor: "#FF0000",
          maxcolor: "#80FF00",
          position: "bottom-inner",
          attribute: "mech.hp",
          visibility: CONST.TOKEN_DISPLAY_MODES.HOVER
        },
        "bar2": {
          id: "bar2",
          ignoreMax: true,
          ignoreMin: false,
          mincolor: "#700000",
          maxcolor: "#ff0000",
          position: "bottom-inner",
          attribute: "mech.heat",
          visibility: CONST.TOKEN_DISPLAY_MODES.HOVER
        }
      };
      break;
    default:
  }
  data.flags.barbrawl.resourceBars = mergeObject(def_bars, token_bars);
});

Save this script in the directory for your game world and add the path (relative to the json file) to the esmodules array in your world.json, then edit the defaults to your preferences. Once the changes have been made, restart foundry.

Example:

{
  "name": "test",
  "title": "Test world",
  "description": "",
  "version": "1.0.0",
  "minimumCoreVersion": "0.0.0",
  "compatibleCoreVersion": "1.0.0",
  "scripts": [],
  "esmodules": [
      "./defaultbars.js"
  ],
...

More information: https://foundryvtt.wiki/en/basics/world-scripts