Hi and welcome to the next Quick Tip of this week!
In this video I show you how to use the script "SimpleFlow" with a simple scene inside CreativeExperience .
You can use this script for example to simulate objects on a conveyor belt or for any object that should follow a path with a certain amount of objects.
Please copy the script here:

var particles = []; //local copy of rock pool
var startingScales = []; //memorized size of rock
var isRunning = true;
var zero = new DSMath.Vector3D();
var rotateSpeedVect = new DSMath.Vector3D(0, 0, 1);
var timer = 0;
var speedInPerc = 0;
var particleTemplate;

beScript.onStart = function () {
   console.log('start');
   particleTemplate = STU.Experience.getCurrent().getActorTemplateByName(this.TemplateName);

   speedInPerc = this.Speed / this.actor.getLength();
   rotateSpeedVect = new DSMath.Vector3D(0, 0, this.RotateSpeed / 100);

   beScript.reset();
};

/*
CAPACITY to reset
call this from NL when switching    
*/
beScript.reset = function () {
   particles = [];
   for (var i = 0; i < this.StartCount; ++i) {
       particleTemplate.createDynamicInstance({
           name: "MyActor" + i,
           onInstantiationSuccess: function (actor) {
               particles.push(actor);
           }
       });
   }
   console.log(particles.length);
   startingScales = [];
   // this.RockPool.visible = true;
   //startingPosition = this.Emmiter.getPosition();
   for (var i = 0; i < particles.length; i++) {

       console.log(particles[i].getBoundingSphere().radius);

       startingScales.push(particles[i].getScale());
       particles[i].life = 3000;
       particles[i].index = i;
       particles[i].visible = false;
       particles[i].progress = 0;

   }
}

beScript.switchEmmiter = function (em) {
   this.Emmiter = em;
   beScript.reset();
}

beScript.onStop = function () {
   //Will be called on experience stop.
};

beScript.startFlow = function () {
   this.isRunning = true;
   beScript.reset();
}

beScript.stopFlow = function () {
   this.isRunning = false;
}

beScript.execute = function (context) {

   if (!isRunning) {
       return;
   }

   var emitOne = true;
   timer += context.deltaTime;

   for (var i = 0; i < particles.length; i++) {

       if (!particles[i].visible) {
           if (timer > this.FlowSpeed && emitOne) {
               //console.log(particles[i].life);
               if (!particles[i].visible) {
                   particles[i].visible = true;
                   emitOne = false;
                   timer = 0;
               }
               else {
                   continue; //perf
               }
           } else {
               continue; //perf
           }
       }

       particles[i].life += context.deltaTime;
       particles[i].progress += speedInPerc * context.deltaTime / 10;

       if (particles[i].progress > 0.95) { //reset

           // console.log(particles[i].getPosition().z);
           beScript.emitParticle(particles[i], 0, startingScales[i]);

       } else {

           particles[i].setPosition(this.actor.getValue(particles[i].progress));
           particles[i].rotate(rotateSpeedVect);

           // // make smaller
           // if (this.SpeedOfCrush > 0) {
           //  var newScale = particles[i].getScale() - context.deltaTime * this.SpeedOfCrush / 100000;
           //  particles[i].setScale(newScale);
           //  //particles[i].RigidBody.createSphere(this.particlesize * newScale);
           // }

           //split in half
           if (this.TimeToSplit > 0 && particles[i].life > this.TimeToSplit) {

               var r1 = beScript.getFreeParticle();
               var r2 = beScript.getFreeParticle();

               if (r1 == null) {
                   continue;
               }
               if (r2 == null) {
                   r1.visible = false;
                   continue;
               }

               console.log('split');

               var newScale = particles[i].getScale() + Math.random() * 0.3;

               beScript.emitParticle(r1, particles[i].progress, newScale);
               r1.delay = 0;
               r1.visible = true;

               beScript.emitParticle(r2, particles[i].progress + speedInPerc * 5, 1 - newScale);
               r2.delay = 0;
               r2.visible = true;

               beScript.emitParticle(particles[i], 0, startingScales[i]);

           }

       }

   }
};

beScript.getFreeParticle = function () {
   for (var i = 0; i < particles.length; i++) {
       if (!particles[i].visible) {
           particles[i].visible = true;
           return particles[i];
       }
   }
   return null;
}

beScript.emitParticle = function (particle, progress, scale) {
   particle.setScale(scale);
   particle.progress = progress;
   particle.life = 0;
   particle.visible = false;
}