Killing 2 birds with one stone here and completing 2 challenges with 1 card! Firstly, the challenge at 365 Cards Day 80, entitled 'You're So Plaid'. It requires you to create a plaid pattern on the card. My first thought when I saw it was to make use of Chatterbox papers, not the recent ones but those that came out in 2005/6. There were lots of plaid patterns in almost all the old Chatterbox collections. And yes, I've been hoarding a fair few of them.
Secondly, the challenge at Card Patterns Sketch #15. Here's the required sketch:
Here's my take on both challenges: