Lesson 1 Introduction to Scratch Basic blocks Using the arrow keys to move your sprite Initialization

Introduction to Scratch 3 areas The stage area The sprites area The scripts/costumes/sounds area

The Stage Area

The Sprites Area Sprites = actors We can have any number of sprites. Each sprite has its own set of scripts, costumes and sounds. Stage (background) You can draw your own sprite.

The Scripts Programming part Drag the blocks to the scripts area

The Costumes Important part of making a live motion

The Sounds

Basic blocks Start Motion blocks Move Setting the position of the sprite When the sprite touches the edge, it bounces (to the opposite direction).

Basic blocks Event block Looks blocks Sound blocks When a ‘key’ is pressed Looks blocks Change costume Sound blocks Play sound

Using the arrow keys to move your sprite

Initialization Reset necessary objects to default value E.g. (starting) position of sprites Counting variables (will be taught next lesson) etc.

Exercise 1 Your task: The “Cat” sprite moves under the user’s control using arrow keys. The costume of the Cat changes so that it looks like walking. Set the starting position of the Cat (initialization). The Cat “meow”s (play sound) when it goes to the right.