Relative tempo triplet creation

Hi there, could somebody kindly help me create this please:

I have the Metrico font, but I just don’t know the method!

I use museglyph but I assume it’s similar. Make sure you’re entering text into the text popover (Shift X).
For muse glyph it’s 3qqq = ee e.
Looking at the metrico GitHub page, I see it’s a little different. Check this out for examples.