This stitch pattern is a re-creation of that from an afghan I made in 1969 or 1970. I lost the original pattern years ago. And, after years of use, the original blanket was already faded and worn when it was accidentally put in the washing machine and dryer (and felted).
The pattern includes written instructions and a chart for the pattern.
One skein of DK yarn (183 yds - 167 M) will give you a scarf about 6x35" (15.25x89 cm). For a longer scarf you will need a second skein.
If you want to make an afghan from this scarf pattern, you need to determine the size you want, the number of square inches in that size and how many square inches of blanket/scarf you get for each ball of yarn. My blanket has 8 repeats across and 5 or six stitches on the edges.