Random Number Generation Without Python's in-built ".random" Function

Using Gaussian distribution (Normal distribution) is it possible to generate random numbers in the range of 0,1 without Python's in-built function?

I've tried the Linear Congruential Method and Mersenne Twister Algorithms forked right from GitHub but it's too complex to understand.

I'm also avoiding Numpy or any external libraries for now.

Any Suggestions/links are welcome. Thank you!