Copy from https://playground.babylonjs.com/#GXJ3FZ#51

src/settings.ts

@@ -0,0 +1,30 @@
+const SpawnMode = { Random: 0, Point: 1, InwardCircle: 2, RandomCircle: 3 };
+
+interface Settings {
+  stepsPerFrame: number;
+  numAgents: number;
+  spawnMode: number;
+  trailWeight: number;
+  decayRate: number;
+  diffuseRate: number;
+  moveSpeed: number;
+  turnSpeed: number;
+  sensorAngleSpacing: number;
+  sensorOffsetDst: number;
+  sensorSize: number;
+}
+
+export const settings: Settings = {
+  stepsPerFrame: 2,
+  numAgents: 250000,
+  spawnMode: SpawnMode.InwardCircle,
+  trailWeight: 5,
+  decayRate: 0.2,
+  diffuseRate: 3,
+
+  moveSpeed: 20,
+  turnSpeed: 2,
+  sensorAngleSpacing: 30,
+  sensorOffsetDst: 35,
+  sensorSize: 1,
+};