It was brought to our attention from @Fiona_McDonald and others that there is not an option to trigger a white LED for the AVR drone. The original developer of the AVR GUI is no longer involved with the competition so I hacked my way through getting the dependencies installed to do a build.
The build for the GUI with the white LED option is here:
and this is what it looks like:
and for anyone that wants to see the code:
I hope this helps you out!