This pattern is the free accompanying pattern to the Made bySarahs Mystery Sock KAL kit for May 2020.

The directions for specific striping are included with the yarn in each day of the kit.
You can also use this pattern with the yarn of your choice to make a simple top-down stockinette sock with heel flap heel.

Kit available for purchase at:
https://www.madebysarahs.net/shop/mskal