One finished mystery quilt block, with sashing

I was fortunate enough to be away from NYC in Costa Rica for a week (my 85-year-old mom, pictured below, sponsored the trip and invited me and my siblings and our families) so I am late in posting but here's a block with the sashing around it with the corner post blocks. I'm a little sorry I don't have better contrast between my yellows and the neutrals (I changed around the colors Bonnie suggested) but aside from that I like it pretty well. And I thoroughly enjoyed participating, and linking up with quilters from around the world!
I am already looking forward to next year's mystery.....