Introduction to Scratch 2.0 – Lesson Four
Scratch 2.0 and the xy-grid
Let’s work with coordinates!
In this lesson, we are going to learn how to use the x and y coordinates in Scratch. At the end of this lesson, you should know how to:
- identify x and y coordinates
- write a script to make a shape using the x and y coordinates
- add the x and y background to your animation
First, you need to log in to the Scratch web site. Remember to choose the “create” tab to access the editor.
For this project, we are going to make a new project. When you click on the “create” tab, Scratch automatically gives you a new project, so you just need to rename your project. Let’s call this project “Shapes” or “Shapes and xy grid.” We want to describe our project when we name it so that it is easy to find later.
XY Coordinate Grid
The Scratch programming language is based on a coordinate plane. A coordinate plane is a set of points, based on the size of the space. In this case, our image size is 480 x 360 pixels.
A single point would have both X and Y coordinates. We would use the single point to start our sprite in the same position each time we click the green flag. In the image below, the dinosaur sprite has coordinates of x: -109, y: 113 . There is a dash (-) before the 109. That means it is a negative number. You don’t have to understand what that means, but just know that the dash (-) is important in an xy grid.
In the video below, I’ll show you how to use the coordinates in the scripts you write. Don’t worry if the xy grid still seems confusing. All you need to know is how to use it and the video shows you how to do just that! When you are finished watching the video, come back and try out the practice exercises.
Answer the following questions to become a better Scratch programmer.
3. Can you make your sprite start at (x: 0, y: 0) and glide to the top left (x: -177, y: 133) and the bottom right (x: 181, y: -104) of your screen?
Congratulations on finishing the Introductory Learn Scratch class. You are now familiar with the programming language, Scratch, and you can start to make your own creations. If you are interested in continuing your learning with Artisan Education, check out our other online course options.