All of the possible outcomes have the same 6.25% chance or 1 in 16
Normal
Spider
Lesser
Pastel
Spider/Lesser
Pinstripe
Pinstripe/Spider
Pinstripe/Lesser
Pinstripe/Lesser/Spider
Pastel/Spider
Pastel/Lesser
Pastel/Pinstripe
Pastel/Lesser/Spider
Pastel/Lesser/Pinstripe
Pastel/Pinstripe/Spider
Pastel/Pinstripe/Lesser/Spider
I would love to see that 4 gene snake