Troll pong

Let's flash back to 1972 and create a clone of the popular Atari video game Pong. Instead of starting this program from scratch, we're going to start with a sample project that we can use as a basis for our creativity.

Time for action – open the sample pong project

Open the sample pong game that's included with Scratch:

1. In Scratch, click the File | Open menu to display the Open Project dialog box.

2. Click on the Examples button. Then open the Games folder and select Pong. Click OK to load the project.

3. Play the game by clicking on the flag. Move the mouse left or right to control the paddle and hit the ball.

4. Move the mouse up and down the stage. The paddle doesn't move.

5. When you've had enough, stop the game.

6. Let's get some more information about what the ball is doing. From the Motion palette, click on the checkbox next to direction. This displays a new report block on the stage that shows the ball's direction.

   

7. Play the game again and note how the ball direction value changes as the ball...