Non periodic orthonormal basis of $W^{1,2}$

Question

I'm looking for different orthonormal basis of the space $W^{1,2}(0,1)$, i.e. the space of functions $L^2(0,1)$ with firth derivative also in $L^2(0,1)$. In particular I'm interested in a non periodic basis. Does someone know where I can find a sort of list of basis of $L^2$ or $W^{1,2}$?