Materials: 3 skeins each of the outer 2 colors, 2 skeins each of the inner 3 colors. (4,524 yards, 12 skeins)
Cast on 600 stitches (working with sport weight and size 5 needles - less would be needed if working with larger yarn and needles).
Work entirely in garter stitch.
On first row, place stitch marker between stitches 300 and 301.
Every other row: knit to 2 before the stitch marker, k2tog, slip marker, ssk, knit to end of row.
Either knit in one color or change colors as you go to make a color block blanket.
If you’re changing colors, I suggest selecting either a knit row or a decrease row and always switch colors at the beginning of the type of row selected.
Proceed until two stitches remain. Knit 2, turn, k2tog, turn, finish by cutting yarn and pulling through the loop left on the remaining stitch. Sew in any remaining ends.