How can I create an animation of platforms

Well i think i may be able to help a little bit: -Create a zone script and attach it to a big box which is covering the boxes and some space around them then remove the mesh renderer component for sure then make it's collision as a trigger this Zone's script will call a function attached to father of these boxes which this function is going to make the boxes moving randomly. Zone.js:

 public var Boxes:GameObject;
 function OnTriggerEnter(other:Collider)
 {
    if(other.gameObject.tag=="Player")
    {
         Boxes.GetComponent(Shuffler).Shuffle();
         //well lets call that funciton Attached to Boxes father Shuffle
    }
 }

Shuffler.js(Attached to boxes father):

 public var children:GameObject[];
 public var MaxForce:Vector3;
 function Shuffle()
 {
     //well u can replace any other algoritm u want to here !
     for(i=0;i<children.length;i++)
     {
         //lets genrate some random force u may need to adjust this part a little bit if u dont want them to go all around!
         var randomForce:Vector3;
         randomForce.x=Random.Range(-MaxForce.x, MaxForce.x)
         randomForce.y=Random.Range(0, MaxForce.y)
         // i made it between 0 and max force caz i thought u wont need to shoot them down and then have them bounce back :/
         randomForce.z=Random.Range(-MaxForce.z, MaxForce.z)
         
         children[i].rigidbody.AddForce(randomForce)
         
     }
 }

az i've told u before u may need to adjust algoritm used in shuffle function but i just tried to help and i've gotta admit i have no idea what to do about them music thing but u can add an increasing force algoritm instead of this random thing so that each of them is jumping more (or maybe less ) than the one before it that's good idea i think.:D