The pattern can be found here (You will need to sign up for a free Ravelry account to access the patterns I share from that site). It is a knitted pattern. Yarn and Needle info to follow pics.
At one triangle complete:
Three triangles completed:
Lesson one: COUNT YOUR STITCHES!!! I made this rookie mistake and though the pattern is still coming out beautifully, since I failed to count my stitches every so often, I have to make up for it consistently so the finished project looks right.
Nordlys by Viking - 75% Superwash / 25% Nylon - Color No. 934
Size 4 interchangeable circulars by KnitPicks.
If you are interested in learning a handy cast on method needed for the 2nd and subsequent triangles, I learned the Cable Cast On and it works like a dream. Here is a youtube video showing how to do this cast on: Cable Cast On.
I do not own this video, I am simply offering it as a tutorial and learning device.