Would seem would need to encapsulate that inside another while or for loop which iteration is controlled by whatever is the desired set of conditions. To get back would then be a break.
Or perhaps one could construct the logic as an error handler utilizing try...catch; it's hard to say specifically w/o a better definition of the problem than just trying to read someone's code from scratch.
Perhaps if you were to write a pseudo-code with only the outline of the process without the details the overall structure would be more apparent to readers here...as is, it's so detailed not easy to see the forest for the trees, so to speak...
