I wanted to generate a normal random variable which has a predefined co-variance with another random number.

I wanted to generate a normal random variable which has a predefined co-variance with another random number. But I can't figure out how to proceed.Here is the specific problem,

I have e~N(0,1) and I want to generate X such that cov(x,e)=1 and E(X)=0. How can I generate this random number with sample size 500?

Thanks!