Scratch Programming Language: Build a Simple Game, Part 2

1. 
   In the lower right, click the Sprites icon.
    
2. In the collection of sprites, look for the Paddle sprite. Alternatively, any sprite of suitable shape can be used, such as the Broom or the Convertible.
3. 
   On the Stage, move the paddle close to the bottom of the space.
   
   
   
   
   
   
   
    
4. 
   In the lower right, ensure that the Paddle sprite is still selected.
   
    
5. 
   From the top left, under Motion, drag the set x to (number) code block to the middle.
   
    
6. 
   From the left, under Sensing, drag the mouse x code block onto the previous code block. It will replace the number. This will lock the paddle to the mouse and keep its "height" on the stage the same (lock its x value).
    
7. 
   From the left, under Control, click the forever code block and drag it over the existing block. The forever code block will turn gray as it slides over the other block. Make sure that the new block "contains" the other block before letting go.
   
    
8. 
   At the left, under Events, find the
   When () clicked code block.
9. Drag it out and position it on top of the group of blocks.
10. Above the stage, click the Flag icon to
    start ( ). Click the Stop sign icon to stop the game ( ).

That's it! The Paddle is complete. Now we need to add the code blocks to allow the Ball and Paddle to interact with one another.

The If/Then Code Block

1. 
   In the lower right, select the Ball sprite.
2. From the left, under Control, drag the if (    ) then code block to the middle.
   Note: Don't add this code block to the previous stack of code blocks. This is the start of a new group.

Make Ball Detect Collision with Paddle

1. 
   From the left, under Sensing, click and drag the
   touching ( mouse pointer ) ? code block onto the hexagonal placeholder of the if (    ) then code block.
2. Select the drop-down arrow of the
   touching ( mouse pointer ) ? code block and change mouse pointer to Paddle.
   Note: We have the IF, now we'll add the code blocks for the THEN, to tell the Ball what to do after it touches the Paddle.

Add Ball's Reaction to Being Hit by Paddle

1. 
   From the left, under Motion, click and drag the
   Turn ( 15 ) degrees code block to the middle and place it inside the if (    ) then code block.
2. Select the number in the Turn ( 15 ) degrees code block. Change the number to 180.
    
3. 
   From the left, under Motion, click and drag out the
   Move ( 10 ) steps code block and place it inside the
   if (    ) then code block, below the code block that's already there.
    

Add Forever Loop, Start Flag

1. 
   From the left, in Control group, select the forever code block. Move it over the stack of code blocks, where it will show a gray "shadow." Position the shadow so that it contains the entire stack and release the mouse button.
   
   
    
2. 
   At the left, under Events, find the
   When () clicked code block.
3. Drag it out and position it on top of the group of blocks.
4. Above the stage, click the Flag icon to
   start ( ). Click the Stop sign icon to stop the game ( ).

You're almost done! Now we need to add features that allow you to keep score, to make this a real game! Click the next tab to finish your game!