Activity

# Magic 8-ball

Beginner | MakeCode, Python | Accelerometer, LED display | Randomisation, Selection

## Step 1: Make it

### What is it?

Recreate a classic toy from the 1950s with your micro:bit and customise it to make it your own.

### How it works

• A Magic 8-ball is a toy invented in the USA in the 1950s. Shaped like an oversized pool ball, you ask it a question like ‘will I be rich and famous one day?’, shake the ball and one of 20 different answers randomly appear in a window. Answers can be positive, negative - or somewhere in between.
• This program recreates a Magic 8-ball using the micro:bit’s accelerometer, its ability to make random numbers and its LED display output to show a tick for yes, a cross for no or a ‘meh’ face for ‘not sure’.
• The program generates a random number between 1 and 3 then uses if… then… else… if… statements to make different symbols appear depending on the number. This is known as selection.
• If the number is 3, it shows a tick for ‘yes’. If the number is 2, it shows a cross for ‘no’.
• The program doesn’t need to check if the number is 1, because if it’s not 3 or 2, it must be 1, in which case it shows a ‘meh’ face for ‘not sure.’

### What you need

• micro:bit (or MakeCode simulator)
• MakeCode or Python editor
• battery pack (optional)