The for() loop won't work here because it would be exeuted for any strategy run.

Instead:

int StepsFast = 10, StepsSlow = 40;
NumTotalCycles = StepsSlow * StepsFast;

and then:

Fast = 10 + (TotalCycle % StepsFast);
Slow = 20 + (TotalCycle / StepsFast);

at least that's the basic idea.