Module 3: Flower Generator

Official Raspberry Pi Project

This lesson is based on the official Raspberry Pi Foundation project. Open it alongside this guide to access the starter project, step-by-step instructions and community remixes.

How to use it: Click the link above, then click See Inside on the Scratch project to explore the finished version. Use Remix to get your own copy to edit.

What You Will Build

Build a system to generate flower patterns using the Pen extension and loops.

What You Will Learn

By the end of this project you will be able to:

• Use Events blocks to start scripts and respond to clicks
• Combine Motion, Looks and Sound blocks to create behaviours
• Use variables to track game state and scores
• Apply the specific Scratch concepts introduced in Module 3

You Will Need

Step-by-Step Guide

1. Enable the Pen extension.
2. Create a small petal sprite.
3. Use a repeat [8] loop to stamp the petal 8 times, rotating 360/8 = 45 degrees each time.
4. Add a colour change per petal: change pen color by [10] per loop iteration.
5. After drawing one flower, move to a new random position and draw another.
6. Add a slider for petal count (4–16) and a slider for petal size.
7. Add a background colour picker.
8. Add animation so each petal appears with a growing effect.
9. Add a clear button to erase and start a new field.
10. Add seasonal themes: spring (small flowers), summer (large sunflowers).

Extension Challenges

Try these after completing the main project:

• Add stem and leaf sprites beneath each flower using the pen.
• Make flowers sway using a sine wave animation.
• Export flowers by remixing and sharing generated arrangements.

Reflection Questions

1. Which Scratch blocks did you use most in this project?
2. What would you add or change if you had more time?
3. How could you reuse the ideas from this project in a different context?

Share Your Work

When your project is complete, click Share in Scratch and post the link to your class or the Techbase community.