I'm getting stuck on the pattern that I'm using. I started knitting just a few months ago so I'm new at this. The pattern I'm using says "Row 13-16: with A knit first and last 4 sts, attach B and knit rem sts. Fasten off B." I understand what the pattern is calling for but I'm not sure if I should bind off each time I change colors? if that is the case, it is a lot of binding off, it seems like way too much. Does anyone know how to change colors at two ends?