Before we dig deep into the theory, let's take some time to make a class and see it in action.

First, we will need to create a sphere in our Hierarchy view:

1. Click on the Create button.
2. Hover over 3D object and click on sphere.
3. Name the sphere Ball.
4. In the Inspector, make sure that all position elements are 0. Alternatively, you can simply click on the gear icon and select reset.
5. With the sphere reset, change its position.x to 3.05, position.y to 0.87, and position.z to 4.15.

Now, we will add a script file to the ball:

1. Click on the Add Component button in the Inspector.
2. Scroll down to New Script and click on it.
3. Name the script LaunchBall; click on Create and then on Add.
4. Double-click on the Launchball script in the Inspector.

Visual Studio should be loading now. Once it is loaded, you should see a blank class called LaunchBall with two using statements and two methods, Start and Update. Now, we will need to copy or type the following code into that class.

Let's take a look at Part 1 of the code for the LaunchBall.cs file:

using UnityEngine; 
using System.Collections; 


namespace HoloLensBeginnersGuide 
{ 

     public class LaunchBall : MonoBehaviour { 

       // Member Variables 

    public Vector3 launchBallHome =  
                    new Vector3(0.0f, 0.0f, 4.0f); 
    public float lbSpeed; 
    public bool checkLBToggle = true; 
    private Color lbColor;     
    Renderer rend; 
    bool lbJump; 

    void Start() 
    { 
        gameObject.transform.position = launchBallHome; 
        lbSpeed = 0.1f;         
        lbColor = new Color(0.1f, 0.2f, 0.5f); 
        rend = gameObject.GetComponent<Renderer>(); 
        lbJump = true;         
    } 

Let's take a look at Part 2 of the code for the LaunchBall.cs file:

// Update is called once per frame 
       void Update ()  
{ 
        if (lbJump) 
{ 
            TeleportBall(); 
            ChangeColor(); 
            rend.material.color = lbColor; 
            LaunchBallJump(); 
        } 

        if (checkLBToggle) 
        { 
            CheckLB(); 
        } 
       } 

    //Class Methods 
    void TeleportBall() 
    { 
        if (transform.position.y >= 2) 
        { 
            transform.position =  
     new Vector3(transform.position.x, -1, 
                 transform.position.z); 
        } 

    } 

    void ChangeColor() 
    { 
        float redColor = 0.1f; 

        lbColor.r = redColor; 
        lbColor.g = Random.Range(0, 1f); 
        lbColor.b = Random.Range(0, 1f); 
    } 
    void LaunchBallJump() 
    { 
        transform.Translate(Vector3.up *  
                               lbSpeed * Time.deltaTime);         
    } 

Let's take a look at Part 3 of the code for the LaunchBall.cs file:

 void CheckLB() 
    { 
        int i = Random.Range(0, 1000); 
        if(i < 997) 
        { 
            lbJump = true; 

        } 
        else 
        { 

            lbJump = false; 
            transform.position = launchBallHome; 
        } 

    } 


   } 
} 

This is what Unity should look like before we test our new class: the offset white ball against a black background. Now, click on Play in the Unity editor:

Upon doing so, the ball should move to the lower center and start changing colors. It will move up slowly until a certain condition is met, at which point the ball moves down again: