I found a really cool picture of a moth with a human skull on its wings. I processed it with color enhancement and added some red tones to make it more vibrant

Print with a layer height of 0.08 mm and a base layer height of 0.16 mm at a 100% filling density

Remember: You can change the X and Y axes to suit your needs, but don't modify the Z axis, otherwise your replacement position will be incorrect...

Replacement instructions:
Starting with black
Replace it with gray on the 12th layer
Replace it with red on the 17th layer
Replace it with silver on the 25th layer
Replace it with white after the 30th layer