Rat,Corn?

I caught a ratsnake ( i think ) today!
So pretty, base color like sweet buttered corn, indigo to near black (
but not ) markings, splotches.
Look kind of like crosses or the state of Texas outlines upside down.

Caught him ( I checked ) in north Austin, Texas on a creek in an old
industrial area.
The owners are renovating an old building right next to the creek and he
turned up in the rafters.

4 feet 9 inches long, and he did bite me.

3 very sharp pin pricks, drew blood.

I've got in him a covered terrarmium with carpet, water, large tree
bark, and a tshirt for hiding.

Very very wild, strikes at shadows, but calms with handleing. This is
minute to minute, so please have patience.

I want him! Where can I post pictures?

What are my chances of taming him?

Thanks, likes

wws