This document discusses an introductory programming lesson using Scratch that covers manipulating images, playing sounds, program control, making decisions, and repeating actions. The lesson uses Scratch to import ballerinas and make one dance forever by duplicating a movement block. It also imports a background and uses variables to prevent a character called Nibbles from walking off the screen. The document provides instructions and questions to guide users through the basic Scratch programming concepts.

1. Programming from Scratch™
Gerry Rowley

3. In this session
• We will use Scratch to manipulate images
• Play sounds
• Look at program control
• Make decisions
• Repeat actions

4. What is a computer?
• Accepts inputs
• Does some processing
• Has output
• Hardware
• Software

5. Scratch™

6. Hello World
• Traditionally the first program you write in any language is
Hello World

7. Let’s get started
Click on
Create

8. Click on
Costumes

9. Import 4 ballerinas

10. • Next we will choose a background for the stage.
• Here is one I made earlier!

11. • Select Scripts and the Control button

12. • Drag the block on to the script area.
• We want Belinda to dance forever.
• Which block would you choose?
• Would this work?
• How would you make it better?

13. This is mine

14. Meet Nibbles
• He has two costumes
• Changing them makes him look as if he is walking
• Make it so!

15. • I have imported
a background
• This block is not
much good
but it works!
• I used the duplicate
button
• Can you move
Nibbles?

16. Nibbles moves!

17. Could you find a better way?
• What about this?

18. To stop Nibbles walking off the screen
• We need something new
• A variable…
• Something that changes
• We will use X and Y

19. What does this do?

20. There are more activities here
• https://scratch.mit.edu/starter_projects/