As we did in Chapter 3, Let's Make Some Prefabs, we need to create a Player Controller (Script). Inside the Script folder, right-click and then Create | C# Script. We name it PlayerController. Now the script can be used as a component, meaning that it can be attached to a game object:

We can then open the Script by double-clicking on it. For those who didn't follow the previous project, here is a short recap. This is the code you should see:

using System.Collections; 
using System.Collections.Generic; 
using UnityEngine; 
 
public class PlayerController : MonoBehaviour { 
 
   // Use this for initialization 
   void Start () { 
          
   } 
    
   // Update is called once per frame 
   void Update () { 
          
   } 
} 

At the beginning, there are three lines that allow us to use libraries. Then, there is the class definition, in this case, named PlayerController. Inside it, there are two functions: Start() and Update(). The first is called every time this script starts, whereas the second is called at every frame.