Now pay attention to the part - this is formed by shifting the pattern row by row. That means that you start with the 15/0, which you insert over the 11/0. Then add the three 11/0s, and one large 8/0, and you will continue in the same order For the third row, the beads are also shifted to the right to get a clear spiral pattern.
And one more tip: the use beads of different colours for the first row, will keep you from being confused while shifting the pattern to the right.