Fibonacci sequence for KickC

#include "c64.h"
#include "stdio.h"

void main() {
    unsigned int z = 32768;
    unsigned int s0 = 0;
    unsigned int s1 = 1;
    unsigned int y;

    clrscr();
    printf("%u\n",s0);
    printf("%u\n",s1);

    while (y < z) {
        y = s0 + s1;
        if (y < z) {
            printf("%u\n",y);
            s0 = s1;
            s1 = y;
        }
    }
}