In the previous step you learned how you will build the friend detector, and looked at the algorithm you will need to implement. In this step you will start writing some code for the first part of the algorithm when the micro:bit starts.
The first part of our algorithm is:
- At the start:
- Set the counter to 0
- Set the radio group
To create this code we need a variable for our counter, and need to set this to 0 when the micro:bit starts up, along with setting the radio group.
-
Select Variables from the toolbox
-
Select Make a variable...
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Name the variable
counter
-
Select OK
The Variables toolbox will contain a few more items now - a block to use the counter variable, as well as blocks to set or change the value.
-
Drag the
set counter to 0block and drop it in theon startblock on the workspace
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Select Radio from the toolbox
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Drag the
radio set groupblock and drop it in theon startblock on the workspace, below theset counter to 0block. -
Make sure the radio group in the
radio set groupblock is set to1. If not, select the value in theradio set groupblock and use the slider that appears to change the value to 1.
In this step you started writing some code for the first part of the algorithm when the micro:bit starts. In the next step you will write the code that will run in the forever block.