STEP 10: Look at the grey comment to see which parameter controls the width of the square.
print(thing) # thing isn't defined
Your micro:bit is not set up for this program. Follow these steps to use your device with Codesters:
Your micro:bit has an old version of the Codesters binary file. Follow these steps to update the file on your micro:bit:
What is my version number?
Warning: This will erase any existing program on your micro:bit.
How do I upload a program to my micro:bit?
How do I calibrate my micro:bit?
Having trouble? Check out the micro:bit instructions to update your firmware.
Setting up your micro:bit
Error while uploading file to Micro:bit
Try downloading the .hex file instead
Calibrate your micro:bit by tilting it until all the LEDs are lit.
For a demonstration see
the micro:bit calibration instructions.
Try the following steps to connect to your Micro:bit:
1. You may need to reload this page and try your program again.
2. Try disconnecting and reconnecting your Micro:bit. Then reload the page and run your program again.
3. If you are still having problems your Micro:bit may have an old
firmware version that is incompatible with Codesters.
To update the firmware follow these instructions from Micro:bit
Are you already running a Codesters project in another tab or window?
Micro:bit can only connect to one web page at a time.
Try stopping other Codesters projects or closing
other tabs or windows that may be using your Micro:bit.
If that doesn't fix the problem try disconnecting your Micro:bit,
reloading this page, and reconnecting your Micro:bit.
Status: Still connecting...
Status: Not Found
Is your Micro:bit connected?