Modifications (to make twin-size):
Started with ch 281. Did eight rows of each color to get even rows.

Turned out great! I love it!

Ch 286
Sc in first ch. ch 1, sk 1, sc. Repeat ch1, sk1, sc until there are 10 sc.
**
Ch 2. Sk 1, Sc.
Continue with ch1, sk1, sc until there are 10 sc since last Ch2.
Sk 2, sc.
Continue with ch1, sk1, sc until there are 10 sc since last Sk2.
**
Repeat from ** ** to end of ch.
Turn, sl st into last ch1 sp from prev row, ch 1, sc into same ch1 sp as sl st, continue with pattern.
8 rows of one color, then 8 of another, repeating, ending with same as first color.