Foundation, use 2 strands of blue yarn - Ch 66.
Row 1 - sc in 2nd ch from hk, sc in every st across, turn. [65sc]
Row 2 - ch1 (not counted as a st), sc in 1st st, sc in each st across, turn, [65sc]
Rows 3 - 24 - Repeat row 2.
Rows 25 - 26, 1 strand blue and 1 strand white - Repeat row 2.
Rows 29 - 30, 2 strands white - Repeat row 2.
Rows 31 - 39 - 1 strand blue and 1 strand white - Repeat row 2.
Rows 40 - 49, 2 strands white - Repeat row 2.
Rows 50 - 51, 2 strands blue - Repeat row 2.
Rows 52 - 83, 2 strands white - Repeat row 2.
Row 54, 2 strands blue - Repeat row 2.
Rows 55 - 56, 2 strands white - Repeat row 2.
Rows 57 - 58, 2 strands blue - Repeat row 2.
Rows 59 - 68, 2 strands white - Repeat row 2.
Rows 69 - 77, 1 strand blue and 1 strand white - Repeat row 2.
Rows 78 - 79, 2 strands white - Repeat row 2.
Rows 80 - 83, 1 strand blue and 1 strand white - Repeat row 2.
Rows 84 - 107, 2 strands blue - Repeat row 2, cut the yarn at the end of the last row, and fasten off.
Note: Weave in all ends before you start the edging.