its difficult but possible. Slightly harder than just a double-recessive project because you want to add spider.

i would just go for the slightly easier to make but visually more rewarding axanthic clown.
http://www.worldofballpythons.com/mo...xanthic-clown/

personally i dont like the optics when you combine spider and clown. you dont get something new but just something halfway inbetween spider and clown. Some look like a nice spider could look like, some look like a clown + something else could look like. on the other hand, we recently found out that clown + pinstripe-combos produce some smokin hot patterns.
http://www.worldofballpythons.com/mo...n-blast-clown/
http://www.worldofballpythons.com/mo...nstripe-clown/

maybe you should go for orange ghost + pinstripe + clown, or regular ghost + pinstripe + clown? Here i would really expect blockbuster optics.