1. Scratch Another computer programming language Developed by MIT in 2003
Written for 9-yr olds
Version 2.0 (cloud-based) in 2013
Click on ‘Try it out’
Need a scratch account to save the work
Off-line editor
Tutorial

2. Scratch Screen
Stage
Sprite: characters and elements appearing in stage
Blocks palette
Script

3. Scratch Blocks Motion (blue)
Looks (purple): manage sprite apprearnaces
Sound (pink)
Pen (green): control drawing pen
Data (orange): store and display variable data
Events (brown)
Control (gold)
Sensing (light-blue): detect digital/analog inputs
operators

4. Costumes & Backdrops Used to simulate animation
Each sprite has at least one costume
Freely can edit and/or add costumes
Add a new costume
Costume menu
Draw your own
Backdrop
Click on Stage in lower left
Backdrop menu

5. Motion
Look through the list of Motion scripts
Move
Turn
glide

6. Events Look through possible events When flag clicked
When xxx key pressed
When sprite clicked ….

7. Control Controls Repeats (finite or forever) if. .. then .. else
wait until
repeat until

8. Looks Looks Add words Switch costumes Switch backdrops Change color
Change size

9. Sensing Events about interactions When touching another object
Is a xxx key pressed
distance ?
Loudness ?

10. LAB Add Lightening Bolt sprite
Add costumes, Buttefly-a and –b to Cat sprite
Set backdrop to brick wall1
Drag “when flag is clicked” Script pane
Set Cat sprite at (-160, -120)

11. LAB (cont’d)
Have Cat walk to the right until it hits on the Lightening Bolt
When the Lightening strikes, change to butterfly and fly away

12. LAB (cont’d) Set Lightening Bolt at (-10, -20)
Position the Lightning Bolt sprite at (-5, -20)