Hueforge cat on fire 160x160mm to fit A1 mini.

5 colors If you don't want to have to change the filament halfway to add the 5th color, you can eliminate the orange color, it will also look good.

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

Filaments Used:
PLA BambuLab Basic Black Transmission Distance: 0.6
PLA BambuLab Basic Red Transmission Distance: 4.5
PLA BambuLab Basic Orange Transmission Distance: 10
PLA BambuLab Basic Yellow Transmission Distance: 4.9
PLA BambuLab Basic Jade White Transmission Distance: 4

Swap Instructions:
Start with Black
At layer #10 (0.88mm) swap to Red
At layer #13 (1.12mm) swap to Orange
At layer #16 (1.36mm) swap to Yellow
At layer #19 (1.6mm) swap to Jade White for the rest.
 

If you change the size to scale the print remember NOT to change the Z.