I have also used some samples and some extra synthesizer
like angel
Nice stuff - thanks for sharing! I like the custom samples, keep it up 
Thanks, I also added the angel synthesizer, which had no operative and the steps I perform are the ones I describe below.
To add synthesizers to FoxDot, follow these steps:
1 - In the python3.6 / dist-packages / FoxDot / osc / scsyndefs folder, the scd file must be added.
2 - In the python3.6 / dist-packages / FoxDot / lib / SClang folder, edit the _SynthDefs.py file, adding from line 406, for example if the synthesizer we want to add is angel.scd, the following two lines:
angel = FileSynthDef (‘angel’)
angel.add ().
We save and close and the next time we start FoxDot, the new synthesizer will be operational
You can also edit the lib/Custom/startup.py file to run any code at start up or you can also use the --startup flag to point to a file to run any code you want if you don’t want to edit the files in the source code
We wrote a tutorial about it, https://crashserver.fr/how-to-customize-foxdot-with-your-own-synths-effects-functions-and-samples/
Thank you, I didn’t know, I’m going to look at it