This last grouping is called 'String Theory' for two reasons. First, this is string quilting - strips (or strings) of fabric sewn one onto the next. Quite typically, they're made of squares where the strings are on the diagonal, and then you sew them into boxes. (Like in this example.) The second reason they're called String Theory is that I was watching Season One of Criminal Minds as I worked on these cards and I happened to be watching... Derailed, which is an episode with a schizophrenic unsub, and Reid starts talking to him about String Theory. So there the name was.
In any case, one of my favourite string quilts that I've ever seen online, well, I can't find now, but it was done in long strips with horizontal strings, so this first postcard is kind of an homage to the gorgeous quilt. Someday I'll do a full-size quilt the same way, but probably far off in the future.
As I was making this card out of primaries, I got stuck on the idea of grouping my colours together, so I had one stack of red scraps, one of blues, one of yellows, greens, purples, browns, black/whites, oranges. Which is more or less what you'll see in the following cards.