currentFrame

#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>

#define MAX_FRAMES 2

uint32_t currentFrame = 0;

int main()
{

    for(uint32_t i = 0; i < 10; ++i)
    {
        printf("%d ", currentFrame);
        currentFrame = (currentFrame + 1) % MAX_FRAMES;
    }

    return 0;
}

/*
output:

when MAX_FRAMES 2:
0 1 0 1 0 1 0 1 0 1

when MAX_FRAMES 3:
0 1 2 0 1 2 0 1 2 0

*/