Used single thread, cast on 170. 20 garter ridges for each color.

Used the marker placement suggested by jokulik.

Place one marker between each pair of increases and decreases. For example, if the pattern says: k10, k2tog, ssk, then you would do k10, k2tog, pm, ssk. Similarly, for the increases, if the pattern says kfb, kfb, k10, instead you would do kfb, pm, kfb, k10.

Finished size 32x 38.