Mitered squares

Last year, when we first arrived in Jk, we had to live for a while in a very nice flat and I
was "nicely" bored. Kids were at school and I was desperate in finding a new home and the search was not easy.....!
After lunch, I usually used to sit on the sofa, maybe watching tv....It was a long time to stay there and doing nothing, so I started to knit some mitered squares (it was my first attempt!) from some acrylic yarn balls that I had in my luggage....
I didn't have a huge selection of colours with me (my yarn stash was still on the ship sailing from Egypt to Indonesia.....and I was hoping no pirate attack will steal my precious treasure!!!), but I eventually knitted a dozen of mitered squares!
These squares rested in my knitting bag for almost a year! But yesterday I started to sew them together and....Would you like to see what have I done?

I started in collecting a pair of squares, that I pinned to a little zipper and then I sewed them on with a double cotton floss. Easy peasy!

Then, I paired the squares and I started to sew them together using a blanket stitch. Now I have all my yarn with me, so I decided to use a bright turquoise! Nice, eh? Note that the stitching stops at the end of the second side, because...

.....I had to "squeeze" the non-sewn sides, so that you have a kind of pyramid! The tricky part is the following :

You have to pass the yarn through the holes at the top of one half side....can you see? I hope so!
After this passage, you can start again with the blanket stitch, so that you can end the sewing!