Show the form of control structures using flowchart.

Given two numbers X and Y, construct an algorithm and convert into a Python Code to determine the difference between X and Y. Consider the following criteria:

If X-Y is negative, compute R = X + Y;

If X-Y is zero, compute R = 2X + 2Y;

And If X-Y is positive, compute R = X * Y.

Print the values of difference of X-Y, X, Y and R; then it will display another result until the condition is True.