Wikijunior:Raspberry Pi/Scratch Game – Simple Maze
Tutorial by Andrew Oakley
Public Domain
Updated Nov 2017
www.cotswoldjam.org
Getting started
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1. Click on the Raspberry menu, Programming, Scratch.
2. Click the Maximise Window button.
3. Select File menu, Open.
4. Click the Pi button.
5. Select Scratch and click OK.
6. Select simple-maze and click OK.
7. Select smaze1 and click OK. A green and blue maze should appear.
You should now be able to move the Smiley left and right, using the left ← and right → arrow keys.
X is a "variable". A variable can hold a number or a word which can change. X measures the left and right positions.
You should now be able to move the Smiley up and down, using the up ↑ and down ↓ arrow keys. The Y variable measures up and down position.
The Smiley can now move anywhere around the maze, including through the walls.
We need to add rules
[edit | edit source]- To make the Smiley go back to the start if it hits a blue wall
- To say "You win!" if the Smiley reaches the white outline of the exit
Create this new block
To select a colour
[edit | edit source]1. Click the colour box.
2. Click the colour you need.
To start a new game
[edit | edit source]Click the green flag.
What if you make a mistake?
[edit | edit source]Right-click any block and click "delete".
For teachers / Scout / Guide leaders
[edit | edit source]Downloads available from http://www.cotswoldjam.org/downloads/beavers
To add the files to Raspbian, go to the Terminal: 
cd
mkdir -p Scratch/simple-maze
cd Scratch/simple-maze
curl "http://www.cotswoldjam.org/downloads/beavers/cjam-scratch-simple-maze-code.zip" -O
unzip cjam-scratch-simple-maze-code.zip
exit
Note that -O is the capital letter O, not zero.
Files
[edit | edit source]cjam-scratch-simple-maze.pdf
[edit | edit source]The original PDF for this tutorial is on Wikimedia Commons: cjam-scratch-simple-maze.pdf
Maze-person.png
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Maze-stage.png
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