Time for action – building the Enemy class

1. Add a new class called Enemy to the Robot Rampage project.

2. Add the following using directives to the top of the class file:

   using Microsoft.Xna.Framework;
   using Microsoft.Xna.Framework.Graphics;

3. Add declarations to the Enemy class:

   #region Declarations
   public Sprite EnemyBase;
   public Sprite EnemyClaws;
   public float EnemySpeed = 60f;
   public Vector2 currentTargetSquare;
   public bool Destroyed = false;
   private int collisionRadius = 14;
   #endregion

4. Add a constructor to the Enemy class:

   #region Constructor
   public Enemy(
       Vector2 worldLocation,
       Texture2D texture,
       Rectangle initialFrame)
   {
       EnemyBase = new Sprite(
           worldLocation,
           texture,
           initialFrame,
           Vector2.Zero);
   
       EnemyBase.CollisionRadius = collisionRadius;
   
       Rectangle turretFrame = initialFrame;
   
       turretFrame.Offset(0, initialFrame.Height);
       EnemyClaws = new Sprite(
           worldLocation,
           texture,
           turretFrame,
           Vector2.Zero...