First, run a block diagram cleanup. That will go a long ways towards compacting the space.
Second, give all your control/indicator terminals meaningful names and show their labels on the block diagram. What way you know what the purpose of each terminal is. Many of your boolean indicators are missing the labels on the block diagram. And when I went to show them, they were meaningless or default labels.
Third, try to avoid deeply nested structures like loop in a case, in a loop in a case.
Fourth, your code has several major bugs in it. You have numerous while loops that will either run once or run forever. The stop terminal of the while loop is fed by a boolean coming from outside the loop. When that loop runs it will always have whatever value that was at the tunnel of the loop when it started. If it is a True, the loop will only run once, then stop. If it is a False, it will run forever and never stop. Though for every problem that I found in your code, it looks like the while loop will only run once because the stop terminal is fed from a boolean that also controls the case structure. Thus the loop will only run if it is true, and then it will only run once. So most of those while loops are pointless and can just be removed.
