How does one knit stripes or otherwise in more than one colour? I cannot find anything on http://learntoknit.lionbrand.com/ that helps. e.g. n rows of colour A and then m rows of colour B. or, a few stitches of colour C then a few of colour D. or, a combination thereof. Do you keep joining and cutting the yarn? I am sure that I used to know how to do this... NTS: Make knitting icon.