how do this 

Knitting is a process of creating a fabric by looping a single strand of yarn to form interconnected stitches, which are then stacked in rows to build a textile. In contrast, stitching (or sewing) is the process of joining two or more pre-existing pieces of fabric together, typically using a needle and thread. The fundamental difference is that knitting forms the material itself, while sewing assembles it. 
You can watch this video to learn how to knit:

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