Blanket Explanation

There's a bit of confusion over my blanket, so I thought I'd explain. Yes, what I currently have is a triangle:


Once it's the right size, I'll do another three. Then I'll assemble all four with the top points together, like so:

Except my triangles will, of course, end up all different.

I'm doing this to avoid having to wrestle an entire blanket sitting on my lap at the end. At worst, I'll only have a quarter of a blanket on my lap at any time... except during the final seaming, of course.