Introduction to Scratch

Learning Objectives Identify and use event blocks to start a script. Create a sequence of instructions by snapping blocks together. Use a 'forever' loop to make actions repeat. Use an 'if-then' conditional block to make a decision. Make a sprite appear to talk using 'say' blocks. Use the 'ask and wait' block to get input from a user. Have you ever wanted to create your own cartoon or video game? 🎮 Let's learn how to give instructions to a computer to make fun things happen! In this lesson, we will learn how to program using Scratch. We will use colorful blocks that snap together like puzzle pieces to tell characters, called sprites, what to do. This is the first step to becoming a creative coder! Real-World Applications Maki...

TermDefinitionExample SpriteA character or object on the screen that you can program.The orange cat that appears when you start a new Scratch project is a sprite. BlockA single instruction for a sprite. Blocks look like colorful puzzle pieces.The blue 'move 10 steps' block tells a sprite to move forward a little bit. ScriptA stack of blocks connected together. The computer reads the script from top to bottom.A 'when green flag clicked' block connected on top of a 'move 10 steps' block is a simple script. EventAn action that starts a script. Event blocks are shaped like hats and always go at the top.Clicking the green flag is an event that can start your program. LoopA block that makes other blocks inside it repeat over and over again.The 'forever' b...

Event-Driven Start Every script must start with a 'hat' block (an Event block). Your code won't run unless you tell it WHEN to start. Use blocks like 'when green flag clicked' or 'when this sprite clicked' at the very top of each stack of blocks. Top-to-Bottom Sequence Blocks in a script run in order from top to bottom. The computer reads your instructions one by one, starting from the top block and moving down. The order you snap your blocks together is very important. The Forever Loop Pattern Place action blocks inside a 'forever' block to make them repeat. To create an animation or a continuous action, drag a 'forever' block from the Control category and place the blocks you want to repeat (like 'move&#03...