Just came across this mystery in April, which started in January, and decided to "catch up" on the first 4 steps of a lap size quilt. Here are my A Blocks. Still have some cutting to do, but will cut as needed on the next units. Most of my blocks have no two fabrics alike of either darks or lights.
Here's the link to this mystery quilt: https://frommycarolinahome.wordpress.com/category/2016-scrap-dance-tango-mystery
Here are my May units:
Received final clue on June 10. Here is my finished Scrap Dance Tango quilt top. Will put it in line for quilting "one of these days!"