In this Kata, you will be given two positive integers a and b and your task will be to apply the following operations:
i) If a=0 or b=0, return [a,b]. Otherwise, go to step (ii);
ii) If a≥2*b, set a = a-2*b, and repeat step (i). Otherwise, go to step (iii);
iii) If b≥2*a, set b = b-2*a, and repeat step (i). Otherwise, return [a,b].
a and b will both be lower than 10E8.
More examples in tests cases.