I've just spent half an hour searching through my saved contalks folder trying to find a talk from (I think) last year where a someone talks about their new com

I've just spent half an hour searching through my saved contalks folder trying to find a talk from (I think) last year where a someone talks about their new compiler research regarding block-based languages, specifically to make it easy to design and implement custom block based languages. Does this ring a bell with anyone?