Row 1: 2 dc - 1 ch - 2 dc in third loop of chain row. Skip 3 - *2 dc - 1 ch - 2 dc (all in one stitch) - skip 3* Repeat * to * all the way across.
Add in next color or chain 3 at the end of row 1 and turn.
Row 2: *2 dc - 1 ch - 2 dc* all the way across in the chain stitches between the 2 dc in the previous row.
Continue till blanket is the size you want it.
Here is where I got the idea for this pattern.