Rows 1, 2, 5 and 6 are worked in black. Rows 3, 4 and 7 onwards are worked in colour. A different colour can be used for each wedge. This cushion is shaped like an orange (or a brioche, duh), with the wedges worked in different colours of your choice. Cast on 90 sts using a provisional cast on. Use fingering to sportweight wool and needles to suit. You might want to use needles a bit finer than you'd usually use for stockinette stitch.
Note: Slip stitches are worked the same in every row.