The square uses 2 colors.

Do not cut the unused color.

The color change is worked as follows:
with working color yo, insert hook in the st, yo pull up a loop, yo, pull through 2 loops, drop working color, yo with next color and
pull through last two loops.

The number following CA (color A) or CB(color B) refers to the number of stitches in that colour, 1 stitch in each stitch unless otherwise specified. (Example CA5dc in next st means all 5 sts are made with CA in the next st.).

The yardage mentioned will be sufficient for one square.