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How to draw a circle in Scratch

Sean McManus, author of Scratch Programming in Easy Steps and Cool Scratch Projects in Easy Steps, shows you how to draw a multicoloured circle using the pen in Scratch

If you saw my 9-block program to draw a polygon in Scratch, you might be wondering how to draw a circle in Scratch.

The answer is to think of a circle as a shape with 360 sides, and 360 angles of 1 degree, like this:

when green flag clicked / go to x: 0 y: 0 / clear / pen down / set pen size to 20 / repeat 360 / move 1 steps / turn 1 degrees / change pen color by 1 / end repeat

When using the polygon program, you might have noticed that the more sides you have, the more like a circle it looks. In practice, you don't need as many as 360 sides to make it look like a circle on the Scratch screen. You can have 90 sides, move 4 steps, and turn 4 degrees to create a circle more quickly, for example.

To increase the size of the circle, change the number of steps the sprite moves.

Feel free to share that program card on your social networks, or to use it in your classrooms or Code Clubs!

Try the program

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Find more 10 block Scratch demos here. For more information on my Scratch books and more bonus content, visit the Scratch Programming in Easy Steps and Cool Scratch Projects in Easy Steps homepages.

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© Sean McManus. All rights reserved.

Visit www.sean.co.uk for free chapters from Sean's coding books (including Mission Python, Scratch Programming in Easy Steps and Coder Academy) and more!

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