How Do I Procedurally Generate Clouds ?

Hello Community!

I am giving procedural generation a crack. the goal is to instantiate planes (clouds) in a random area on screen.

In my case 0 - 480 on the x - axis, and 0 - 360 on the y - axis.

The script i'm using is this.

Script.js:

 #pragma strict
 
 var blueCloud : GameObject;
 var orangeCloud : GameObject;
 
 var cloudChance : int;
 
 var cloudPosition : Vector3;
 
 var cloudX : float;
 
 var cloudY : float;
 
 function Start () {
 
    cloudChance = Random.Range (1, 3);
    
 if (cloudChance == 1) {
 
    cloudX = Random.Range(0, 4.8);
    cloudY = Random.Range(0, 3.2);
 
    cloudPosition = Vector3(cloudX, cloudY, - 0.2);
    
    Instantiate (redCloud, cloudPosition, transform.rotation);
    
 }
 
 if (cloudChance == 2) {
 
    cloudX = Random.Range(0, 4.8);
    cloudY = Random.Range(0, 3.2);
 
    cloudPosition = Vector3(cloudX, cloudY, - 0.2);
    Instantiate (orangeCloud, cloudPosition, transform.rotation);
    
 }
 
 if (cloudChance == 3) {
 
    cloudX = Random.Range(0, 4.8);
    cloudY = Random.Range(0, 3.2);
 
    cloudPosition = Vector3(cloudX, cloudY, - 0.2);
    
    Instantiate (blueCloud, cloudPosition, transform.rotation);
    
 }
 
 }

But it only Instantiates the plane (cloud) randomly in the top right part of the screen (never behind or underneath the player).

Thanks for the interest so far!