1. BBC Microbit

2. Objective of the lesson
Use Block Editor to make a Rocket Launch
All of you will:
Make numbers display in order 0 to 4
Most of you will:
Change the number sequence
Some of you will:
Make a rocket launch countdown 9 to 1 then a message appear

3. Rocket Launch
We will get a rocket launcher countdown from 10 down to 1 and then display
a message ‘Launch’
Add an ‘on button A pressed’ loop
This will be the button which will launch the rocket
Add a ‘i from 0 to 4’ block

4. Let’s investigate what this does
i is a number that changes. Firstly it is a 0 then a 1, then a 2, then a 3, then a 4
Let’s chance the name from i to be something more friendly. Let’s called it Number
Let’s show this Number so that we can see it on the Microbit

5. Let’s add in pauses of 1 second = 1000ms
Instead of going from 0 to 4, I will make it go from 1 to 5 by adding
the number 1 each time

6. Challenge
See if you can make it display the numbers 2 to 6
See if you can make it display the numbers 4 to 8
See if you can make it display the numbers 1 to 9
Now make it go from 9 down to 1
HINT you start at 9 and subtract the Number
Can you make it then say “LAUNCH”

7. Answers