chain 4 and join to form loop
Rd 1 chain 3 (counts as first dc) 2 dc, ch 2, * 3 dc, ch 2* 3 times join to first ch 3
Rd 2 chain 3 (counts as first dc) *dc in each dc (3 st total), in ch 2 sp for corner, 2 dc, ch 2, 2 dc* 3 times
Rd 3 and all other rounds start with 3 ch counting as first dc, dc in each dc and 2 dc 2 ch 2 dc in each corner
To change color simply end first color at end of round, join the new color anywhere ( I like to do it in a different spot than where I ended to make working in te ends less noticable) following pattern.
For pictures of blankets I've made with this patternBaby Clouds Blankets (read