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Scratch 2.0 Beginner's Guide: Second Edition

You're reading from   Scratch 2.0 Beginner's Guide: Second Edition Create digital stories, games, art, and animations through six unique projects.

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Product type Paperback
Published in Apr 2014
Publisher
ISBN-13 9781782160724
Length 296 pages
Edition 1st Edition
Tools
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Author (1):
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Michael Badger Michael Badger
Author Profile Icon Michael Badger
Michael Badger
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Table of Contents (13) Chapters Close

Preface 1. Welcome to Scratch 2.0 FREE CHAPTER 2. A Quick Start Guide to Scratch 3. Creating an Animated Birthday Card 4. Creating a Scratch Story Book 5. Creating a Multimedia Slideshow 6. Making an Arcade Game – Breakout (Part I) 7. Programming a Challenging Gameplay – Breakout (Part II) 8. Chatting with a Fortune Teller 9. Turning Geometric Patterns into Art Using the Pen Tool A. Connecting a PicoBoard to Scratch 1.4 B. Pop Quiz Answers Index

Time for action – plotting x,y coordinates to draw a square

To complete this exercise, just create a new script in the existing project. That way, we can make use of our custom home block. Let's perform the following steps to do so:

  1. Start the script with the custom home block, and add a pen down block.
  2. Next, we need to add four go to x: () y: () blocks. The coordinates for each block are (100, 0), (100, -100), (0,-100), and (0,0) respectively.
  3. Finish the stack with a pen up block. The following screenshot shows this quick script. As you run this stack of blocks, you'll confirm that you do, in fact, get a square.
    Time for action – plotting x,y coordinates to draw a square

What just happened?

I picked an easy example. We're drawing the square by plotting absolute points, meaning we need to know exactly where to position the sprite in terms of its x and y positions in order to get the shape we want. Drawing a pentagon would have been much more difficult. But let's get back to the square.

In previous exercises, we rotated our...

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