1. Scratch： Animation and game programming
Task 9: Changing style

2. Observation and discussion
What can we observe from the demo?
How to make it?

3. 1. Basic setting How many sprite do we need?
Give it/them name(s) and set rotation.
Prepare costumes.

4. 2. Change clothes. In the script area of the button to change clothes.
We can use "broadcast" to give message from one sprite to another.
Message name：clothes

5. 2. Change clothes. In the script area of the Clothes.
Which block can we use to receive message?

6. 3. Change trousers.
In the script area of the button to change trousers (button2 )
Give message
Message name：trousers
In the script area of trousers
Receive message.

7. 4. Change backgrounds. Prepare different backgrounds.
Prepare a button to change background：
button3﹝Name﹞
In the script area of the button to change background, build blocks.
In the script area of the stage, build blocks.

8. 5. Change costumes and backgrounds randomly.
Prepare a button for random change
button4﹝Name﹞
In the script area of the button for random change, build blocks.
In the script areas of other sprites, build blocks.

9. Scripts

10. Scripts

11. Scripts

12. Conclusion: What do we learn?
1. Basic setting
How to add sprites, set costumes and edit costumes.
2. Change clothes.
3. Change trousers.
“Broadcast”
“When I receive”

14. Conclusion: What do we learn?
4. Change backgrounds.
5. Change costumes and backgrounds randomly.
Set commands.

15. P.S.1：Scratch is developed by the Lifelong Kindergarten Group at the MIT Media Lab. See
P.S.2：Materials are provided by Mr. CHENG Che Hung of NLSI Lui Kwok Pat Fong College.