So the idea is that you'd paste a SARS-CoV-2 fasta sequence into the "Input fasta" box (>header required).
It's a work in progress, still a few things to do:
For a similar approach, but using Scorpio constellations instead, see Stargazer
It's possible to filter the preselected variants with the "def" URL parameter and a regular expression. Try undefined.html?def=V-22 for example.