1. Sequencing
Learning Objective: to be able to design algorithms that use sequencing.

2. This is Bobbot, a robot that is controlled by the BBC micro:bit.
You are going to be using it to help you learn key Computer Science concepts.

3. LeftMotor.forward(on) RightMotor.forward(on)
Algorithms
An algorithm is a set of steps that can be followed to solve a specific problem.
Algorithms can be represented in a number of ways, these include:
Flowcharts
Start
Stop
Left Motor Forward On
Right Motor Forward On
Pseudocode
LeftMotor.forward(on)
RightMotor.forward(on)

4. Flowcharts Start / Stop Input / Output Decision Process
Flowcharts allow us to design algorithms using symbols.
These are the main symbols used in flowcharts:
Start / Stop
Input / Output
Decision
Process

5. Predict what this algorithm will do: Right Motor Forward Off
Activity 1
The simplest type of algorithm takes the form of a sequence.
Start
Left Motor Forward On
A sequence is a set of instructions that are carried out once in the order they appear.
Right Motor Forward On
This is an example of a sequence:
Delay 2
Predict what this algorithm will do:
Left Motor Forward Off
Prediction:
Right Motor Forward Off
Stop

6. Fill in the blanks to complete the algorithm:
Activity 2
This is the design for an algorithm that makes the Bobbot go forward for 5 seconds, then backward for 5 seconds before stopping.
Fill in the blanks to complete the algorithm:
Start
Left Motor Backward On
Left Motor Forward On
Right Motor Forward On
Delay 2
Delay 2
Stop

7. Sending a 1 to a pin turns it on and sending a 0 turns it off.
Pins
The BBC micro:bit sends signals through its pins to control Bobbot’s motors.
Pin
Controls 16
Right Motor Forward 12
Left Motor Forward 8
Right Motor Backward
Left Motor Backward
Sending a 1 to a pin turns it on and sending a 0 turns it off.

8. Right Motor Forward Off
Activity 3
An algorithm is turned into a computer program by writing it in program code.
Match the lines of program code to the algorithm:
Start
Left Motor Forward On
Right Motor Forward On
Delay 2
Left Motor Forward Off
Right Motor Forward Off
Stop

9. Touch Develop
You are going to use the Touch Develop programming language to program Bobbot.
Click this button to download your program. Once downloaded you will need to copy it onto the micro:bit

10. Place a screenshot of your code here:
Activity 4
Use Touch Develop to create the program you designed in activity 3 and test it on Bobbot.
Place a screenshot of your code here:

11. Activity 5
Here is part of the program code for the algorithm from activity 2. You need to complete it by adding the missing code.
Add code here to move forward for 2 seconds and stop.
Place a screenshot of your code here:
Add code here to stop moving backwards.

12. Right Motor Forward Off
Turning
You can turn Bobbot by making only one of the motors go forward.
For example if you want to turn left then you can make only the right motor move forward.
Start
Stop
Right Motor Forward On
Delay 1
Right Motor Forward Off

13. Right Motor Forward Off
Activity 6
Complete this algorithm for Bobbot that is designed to make it move forward, turn left and move forward again before stopping.
Start
Left Motor Forward On
Right Motor Forward On
Delay 2
Right Motor Forward Off
Stop
Delay 1

14. Place a screenshot of your code here:
Activity 7
Turn the algorithm you designed in activity 6 into a program and test it on Bobbot.
Place a screenshot of your code here:

15. Place a screenshot of your code here:
Extension
Adapt your program from activity 7 to make Bobbot move to form a square pattern.
Place a screenshot of your code here: