Knitting an old-fashioned opera hood

Make a chain of 90 stitches. Then knit one row across, then seam a row, knit a row, seam a row, knit a row; then join the white, knit a row, seam a row, knit a row, seam a row, knit a row; join the magenta and knit a row, knit a row, seam a row, knit a row, seam a row, knit a row; join on the white, knit a row, and repeat as above until you have nine rows of magenta and eight of the white. On the last row of magenta, slip and bind off, holding the stitches tight.