void timer0 (void) interrupt 1 using 1
{
    if (++ cycle == 10000) {

          <code to be triggered every 1 second>
           
          cycle = 0;
    }
}

void main()
{
 TH0 = ??;
 TL0 = ??;
 TMOD = TMOD | 0x02;
 TR0 = 1;
 ET0 = 1;

 while (1) {

 }
}