Print at 100% infill with a layer height of 0.08mm with a base layer of 0.16mm
Start with Black
At layer #7 (0.64mm) swap to Sfumature di Grigio
At layer #8 (0.72mm) swap to Arancione
At layer #10 (0.88mm) swap to Arancione
At layer #17 (1.44mm) swap to Arancione
At layer #18 (1.52mm) swap to Rosso
At layer #19 (1.6mm) swap to Rosso
At layer #20 (1.68mm) swap to Giallo for the rest.

It could have come out better, but I didn't have all the colors :(.