Time for action – viewing the StarField in action

1. Add the following declaration to the Game1 class:

   StarField starField;

2. In the declarations area of the Game1 class, temporarily modify the declaration for gameState from GameStates.TitleScreen to GameStates.Playing:

   GameStates gameState = GameStates.Playing;

3. Update the LoadContent() method of the Game1 class to initialize the starField object. Be sure to place this code after the spriteSheet texture is loaded.

   starField = new StarField(
       this.Window.ClientBounds.Width,
       this.Window.ClientBounds.Height,
       200,
       new Vector2(0, 30f),
       spriteSheet,
       new Rectangle(0, 450, 2, 2));

4. In the Upate() method, add the following line to the GameStates.Playing section of the switch statement you created earlier:

   starField.Update(gameTime);

5. In the Draw() method, change the background color from Color.CornflowerBlue to Color.Black.

6. Still in the Draw() method, add the following line to the if block containing GameStates.Playing:

   starField.Draw(spriteBatch...