playing sound and displaying picture - condition within loop

[Erikvdb]

I agree with Jeff that we shouldn't fix entire programs here, and there is indeed a lot wrong with your code

The main issue here is that your for loop inside the while loop makes absolutely no sense and your "x <= 3" will never trigger because if x is smaller than 3, it's also smaller than 7.
For a proper random chance calculation (with a given chance), use something like:

if random.random() < 0.7

Or if you want to make sure that it is always going to be exactly 7 out of 10, make a list with 7 "A"s and 3 "B"s, random.shuffle() the list and iterate over that.