Amazfit Watch faces

So I just joined the amazfit community (I have been making watchfaces for Redmi Watch 4), I've been trying to make my first watchface using the Sasha's editor and so far I've been able to get some stuff done (like analog and digital clock) but I can't understand some stuff, like the sunrise/sunset indicator.

Spoiler

I made this watchface for the Redmi watch, but as I said before I can't seem to get how the sunrise thing can be done... been trying to check what images it takes, checking the json file but nothing so far. Instead of getting help for this particular problem (which would be so grateful if someone guides me) I'd like to know if there's a wiki/documentation or anything to learn how to use this tool.

Thanks in advance if you got to read all this.