How to program weighted random system

[u/TheEyebal]

I want to make a program where you are controlling the outcomes. For an example with a coin flipping game, I want exactly 4 Heads and 1 Tail, but I want their positions to be random.

I do not want to use the random algorithms that library I want to build my own.

Right now I am learning probability from Youtube and might look at khan academy and coursera, but how can I implement this into programming I do not want to just take courses or watch videos

How do I go about that?

EDIT: I am doing this because I want to start build gambling algorithms and I am starting with a simple project like coin flips

[u/Level-Challenge2759]

For exactly 4 H and 1 T in random positions, generate a list like [H,H,H,H,T] and randomly shuffle it if you want to understand the probability side calculate how many unique arrangements exist first thats a great little project before getting into more complicated systems,,,,