I used elegoo pla+ for all colours except black which was bambulab basic, but any black works. Bambu red or esun pla+ fire engine red would work better on this.

0.08mm layer, 1 walls, 100% infill, 0.16 initial layer

Because it is 5 colours, you need to set the yellow in the same spot as grey then put a timer to remember to change it. When you hit Print, the slicer will ask you to set a slot for that 5th colour. Tell it that it will be in the slot that the grey is, then as soon as the grey part is done take out the grey and add the yellow.

DO NOT change Z size! If you want to make it smaller or bigger then uncheck ‘uniform scaling’ and change X and Y, leave Z height at 100%.

Start with Black
At layer #6 (0.56mm) swap to Light Gray
At layer #9 (0.8mm) swap to White
At layer #15 (1.28mm) swap to Black
At layer #17 (1.44mm) swap to Red
At layer #22 (1.84mm) swap to Yellow
At layer #23 (1.92mm) swap to White for the rest.