Please note that I added white to his eyes with a paint marker after it finished.

Print at 100% infill with a layer height of 0.08mm with a base layer of 0.16mm

Swap Instructions:
Start with Brown
At layer #9 (0.8mm) swap to Metallic Green
At layer #16 (1.36mm) swap to Yellow
At layer #22 (1.84mm) swap to White for the rest.