Code to Note
Let’s take a look at the code blocks in this experiment.
If you are having a hard time viewing this code, click on the image above to get a better look!
Forever
The
forever
block is a block that loops any other command blocks inserted into it over and over
again…forever. It starts from the top and executes your code in order working its way to the bottom
and then starts at the top again.
Digital Write
The
DigitalWrite
block enables you to turn a pin on or off. There is a dropdown option for which pin
you want to control, and it accepts a variable as the pins state. You use
1
as on and
0
as off. If you
prefer, you can also use Boolean states of
true
and
false
, but we will use
0
and
1
as our standard
throughout this guide.
Pause
If you were to just turn pins on and off with the
digital
write
block without a pause, the LED would
blink really, really fast. The
pause
block enables you to slow the micro:bit down and lets you control
the timing of things happening. It accepts a number or variable as the number of milliseconds you
want the micro:bit to pause. Think of this block as a stoplight for your code!
What You Should See
You should see your LED blink on and off at 1-second intervals. If it doesn’t, make sure you have
assembled the circuit correctly and verified and uploaded the code to your board, or see the
Troubleshooting section.
