Translations:Adventist Youth Honors Answer Book/Arts and Crafts/Knitting - Advanced/6/en
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The simplest intarsia pattern is for straight vertical stripes. After the first row, the pattern is continued by always working each stitch in the same colour as the previous row, changing colours at exactly the same point in each row. To make more elabourate patterns, one can let this colour boundary drift from row to row, changing colours a few stitches earlier or later each time.