If your snake is het anery, you could produce snows (if bred to another snake that has both the anery and amel genes).
If your snake is not het anery, there is no way to make snow in the first generation of offspring.
If it has no hets at all, the most you could produce are a combination of the motley and amel genes (or normals). (or breed to an ultra or ultramel to produce ultramels as well)
motley amel x motley amel = motley amel
motley amel x amel = amel het motley
motley amel x motley = motley het amel
motley amel x motley het amel = motleys and amel motleys
motley amel x amel het motley = amels and amel motleys
motley amel x normal het amel, motley = normals, amels, motleys, amel motleys
motley amel x just about anything else with no hets = normal.