I’ve been doing some more complicated things – but I thought I probably ought to put out the simple version before getting all publicly jiggy with it. This one has an iris closure going to every second corner, a nice basket weave look. This is probably the easiest version of this model to learn, but it uses the same ideas that appear in the more complex versions. This one is made out of a square, but as I note in the SCP, you can make this from any size rectangle. Well, mostly. There are some limits.
The components of the fold is a helical twist down the middle and then an iris pattern on the top, to hold it together.
Good for holding paperclips, pencils, skittles, what have you.
The Sequenced CP.