Everybody makes mistakes from time to time. Luckily, when you notice an error in the row you are knitting, fixing it can be as easy as tinking a few stitches.
You may have already noticed, that "tink" is the word "knit" spelled backwards. When you tink your knitting, it just means that you are backing up by unknitting some of the stitches in your row.
Yarn: HiKoo Sueño Worsted
Needles: skacel by addi Click Bamboo Interchangeable Needles
Notions: locking stitch marker