CREATE PONG II GAME
This is a two player game! To play Pong II:
Press the green start flag. In three seconds a
tennis ball will appear somewhere at the top of
the screen and begin moving randomly toward
the left or right side of the screen.
The left-side player uses the 'q' and 'a' keys to
move the left-side paddle up and down. The
right-side player uses the 'p' and 'l' keys to move
the right-side paddle up and down.
Score is kept for each player. As the game
progresses the ball moves faster and faster!
Play the game before you start building it
yourself!
Start Scratch
3/7/15 Download Instructions
Need Help?
NEW CONCEPTS
LEARN HOW TO:
KEY NEW TECHNIQUE INTRODUCED:
USE STANDARD CODE
FORMS FROM EARLIER
PROJECTS TO CREATE
MORE COMPLEX GAMES
CHANGE SPRITE
MOVEMENT BASED ON
SPECIFIC CONDITIONS
Use the ‘nesting’ technique to apply conditions to If, Then code.
3/7/15 ADD GAME SPRITES
TOOLS YOU WILL NEED
You need a Ball and a Paddle and an additional sprite to be placed
at the bottom of the screen for this game. Use the buttons on the
New Sprite toolbar to create all three of these sprites.
Click the Choose Sprite From Library button. Click the Sports
category.
Double-click the Tennis Ball Sprite.
The Tennis Ball sprite will appear on the game stage.
Now click on the Looks script option and drag the Set Size to …
% block to the script area. Make the value be 50 as shown here.
Click once on the Set Size to … % block and note that the sprite
appears much smaller.
3/7/15 ADD GAME PADDLES
ILLUSTRATIONS
In this game you will continue the art of drawing your own sprites.
Follow these instructions to draw to simple sprites.
Click the Paint New Sprite button. You will see a screen with a
grid under the Costumes tab.
In the bottom right corner of the grid, click on the Convert to
Vector button.
You will see the controls move from the left side of the grid to the
right side of the grid.
3/7/15 ADD GAME PADDLES (CONTINUED)
ILLUSTRATIONS
In this game you will continue the art of drawing your own sprites.
Follow these instructions to draw to simple sprites.
Click the Line button.
Then, to make things a little easier, click the Zoom button in the
bottom right corner of the grid. Click it twice so that the zoom %
shows 400%
The squares on the grid will become larger as shown here.
3/7/15 ADD GAME PADDLES (CONTINUED)
ILLUSTRATIONS
In this game you will continue the art of drawing your own sprites.
Follow these instructions to draw to simple sprites.
You can see a small cross in the center of the grid that signifies
the center of the grid.
Count about five squares up.
Hold the Shift key, then Click and drag your mouse to draw a line
from five squares above the cross, to five squares below the
cross. When you release the mouse button, the line will appear
in the game stage.
This is your first paddle.
3/7/15 ADD GAME PADDLES (CONTINUED)
ILLUSTRATIONS
In this game you will continue the art of drawing your own sprites.
Follow these instructions to draw to simple sprites.
Change the name of the sprite to Player 1 and Player 2.
Click the ‘I’ at the top left corner of the sprite icon.
The screen will change to the screen shown to the left. In the
name box at the top, type in ‘Player 1’.
Then click the blue arrow in the upper left corner to return to the
regular sprite display. Notice the name has now changed to
Paddle 1.
Right click on the sprite Player 1 and click on duplicate. See
how it automatically created another paddle sprite called Player
2!
On the stage you should now see a tennis ball and two lines for
your paddles. Don’t worry about where on the stage the paddles
are sitting, you will fix that later.
3/7/15 ADD GAME SPRITES (CONTINUED)
ILLUSTRATIONS
In this game you will continue the art of drawing your own sprites.
Follow these instructions to draw to simple sprites.
You must draw two more sprites for this game. Again, click the
Paint New Sprite button.
Name the sprite the same way you did for the Paddle. Change it
to say Left Side.
And again, click on the Convert to Vector button. You will see
the controls move from the left side of the grid to the right side of
the grid.
This time, however, do NOT use the zoom button. If the Zoom
stayed at 100% from when you were drawing the paddle, click
the Zoom Out button to go back to 100%.
At the bottom left corner of the grid, there is a slide. With your
mouse, drag the slide bar so it is approximately in the center of
the slide. You will see the line get thicker.
3/7/15 Now click the Line button. Draw a line across the center of the
grid from the top to the bottom.
ADD GAME SPRITES (CONTINUED)
ILLUSTRATIONS
In this game you will continue the art of drawing your own sprites.
Follow these instructions to draw to simple sprites.
The line will appear in the stage.
Using your mouse, drag the thick line to the left of the stage and
center it on the stage. Change the name of this Sprite to ‘Left
Side’.
Right click on the sprite and select Duplicate to create another
line. Change the name to ‘Right Side’.
Your completed stage should now look something like this
3/7/15 POSITION THE PADDLES
BLOCKS YOU WILL NEED
When the game is started, you want the paddles on the right and
left side of the stage.
Before you begin to create code for the paddle, make sure you
have clicked on the correct paddle sprite.
Position the Paddle sprite by moving it to a specific location on
the stage’s X and Y grid. To do this, snap together the blocks
shown at left.
3/7/15 SET PLAYER SCORES TO 0
BLOCKS YOU WILL NEED
When the game is started, each player’s score should be 0.
Create two variables, Player 1 and Player 2. Remember it
doesn’t matter which sprite you create these under as long as
you check “For all sprites”.
The variable sprites will appear on the stage.
Drag the Player 1 score sprite to the upper left corner of the
stage.
Drag the Player 2 score sprite to the upper right corner of the
stage.
Under the Player 1 sprite insert the Set Player 1 block unto the
code.
Under the Player 2 sprite insert the Set Player 2 block into the
code.
3/7/15 ADD PADDLE CONTROLS
BLOCKS YOU WILL NEED
Each player uses a paddle to bounce the ball back toward their
opponent. Player 1 controls their paddle with the q (up) and a
(down) keys. Player 2 controls their paddle with the p (up) and l
(down) keys.
Build the same basic control script that was used in games you have
built before.
Using the Key … Pressed? Block, click the small black down arrow to
see the list of buttons. For Player 1 you will need blocks for the q and
a keys. For Player 2 you need blocks for the p and l keys.
Finally, add the Change y by blocks. Use value 10 to send the paddle
up and -10 to send the paddle down.
Player 1
3/7/15 Player 2
Player 1 3/7/15 Player 2 POSITION THE BALL
BLOCKS YOU WILL NEED
At the start of the game, the tennis ball appears at the top of the
screen and shoots toward the right side of the screen.
Before you begin to create code for the tennis ball, make sure you
have clicked on the tennis ball sprite.
Create a script using the blocks shown to the left. This script will do
the following:
-  When the green flag is clicked make the tennis ball disappear.
-  After three seconds, make the tennis ball appear at the top
center of the stage (x=0, y=215).
-  Point the ball in direction 135
Show Me
3/7/15 3/7/15 CONTINUE BALL CONTROLS
BLOCKS YOU WILL NEED
In this game, after the players have hit the ball a certain number of
times, the ball will speed up to make the game more difficult!
In the Data script option, create a new variable called Hits.
Uncheck the Hits variable, so that it is not visible on the stage.
Move the Set Hits to 0 block to the script are and snap it under
the script you previously created.
Show Me
3/7/15 3/7/15 CONTINUE BALL CONTROLS
BLOCKS YOU WILL NEED
Set up all of the remaining controls for the ball.
Under the script you have already created, snap the Forever
block. Inside the Forever block snap the If on Edge, Bounce and
four IF, THEN blocks.
4x 3/7/15 COMPLETE BALL CONTROLS
BLOCKS YOU WILL NEED
Set up all of the remaining controls for the ball.
In each of the first two IF, THEN blocks, use the blocks at left so
that:
-  If the ball touches the paddle of Player 1, have the ball
bounce off of the paddle in a random direction between 45
and 135.
-  If the ball touches the paddle of Player 2, have the ball
bounce off of the paddle in a random direction between 215
and 305.
-  Change the Hits counter by 1.
If you need help, click the Show Me button (or go to the next
slide).
Show Me
3/7/15 3/7/15 COMPLETE BALL CONTROLS
BLOCKS YOU WILL NEED
Set up all of the remaining controls for the ball.
In each of the next two IF, THEN blocks, use the blocks at left so
that if the ball touches the side of the game it changes score etc.
If the ball hits the Left Side sprite (the left side of the screen):
-  Change player 2 score by 1
-  The ball disappears for three seconds
-  The ball moves to position x: 0 and y: 215
-  The ball is pointed in direction 135 to start the next round
-  The ball reappears
-  Set the Hits counter to 0
If the ball hits the Right Side sprite do the same as above
except:
-  Change player 1 score by 1
-  The ball is pointed in direction 215 to start the next round
Show Me
3/7/15 3/7/15 CHANGE THE BALL SPEED
BLOCKS YOU WILL NEED
Build the code that will make the ball go faster as the game
progresses.
With three IF, THEN, ELSE blocks, and a single IF, THEN block,
build a nest that will contain the code to make the ball move
faster the more times it has hit a paddle.
Show Me
3/7/15 3/7/15 CHANGE THE BALL SPEED (Part 2)
BLOCKS YOU WILL NEED
Build the code that will make the ball go faster as the game
progresses.
In the first IF, THEN, ELSE block, use the blocks at left to tell the
ball to move at speed of “8 steps” if the ball has been hit less
than 5 times.
Show Me
3/7/15 3/7/15 CHANGE THE BALL SPEED (Part 3)
BLOCKS YOU WILL NEED
Build the code that will make the ball go faster as the game
progresses.
In the second IF, THEN, ELSE block, use the blocks at left to tell
the all to move at speed of “10 steps” if the ball has been hit
more than 4 times but less 9 than times.
In the third IF, THEN, ELSE block, use the blocks at left to tell
the all to move at speed of “12 steps” if the ball has been hit
more than 8 times but less 13 than times.
Show Me
3/7/15 3/7/15 CHANGE THE BALL SPEED (Part 4)
BLOCKS YOU WILL NEED
Build the code that will make the ball go faster as the game
progresses.
In the final IF, THEN block, use the blocks at left to tell the ball to
move at speed of “14 steps” if the ball has been hit more than
12 times.
Snap the entire nested IF, THEN set of blocks onto the bottom of
the remaining script (but inside the Forever block and you have
completed the game construction!
Show Me
3/7/15 3/7/15 PLAY THE GAME
Try it!
Click the green flag above the stage to
start the ball moving.
Complete Hints
3/7/15 3/7/15