@heerdm You do half of a triangle end! In this pattern, you would do only the right half of a triangle end and then continue the pattern after. Masha Knots and Alex’s Innovations both have amazing tutorials for this if you don’t know how to do it. Make sure to reply back if you have any questions. I would be happy to answer them!
I'm a beginner so this does seem a little difficult to me but I guess I'll just try! I'm doing it with a cool combination of two different types of pink, two of blue and one yellow string (just as the pan flag) and we'll see how it turns out!