I REALLY want to do this

baby blanket but before i do…i just need to know how do I “carry” the single strand of yarn color im not working with up the side…do i weave it in or just lay it there…
thanks
here is the site…

http://www.straw.com/cpy/patterns/baby-child/bunny_hop-baby-blankt-2color.html

You loosely cross it with the color you’re using on that row. When you’ve done the 2 rows with the 2nd color, it’s right there to start the next 2 rows with.