How to write a C program to make blinking LED with 1 sec delay?

int main(void) {
    while(1) {
        led_on();
        for(int i = 0; i < 0xffff; i++);
        led_off();
        for(int i = 0; i < 0xffff; i++);
    }
    return 0;
}

#include <reg51.h>

void timer0_init( void );

/******************************************************************************/
/*                                     Define area                                          */
/******************************************************************************/
#define  	time_high 0xFB                                      //Change time here
#define  	time_low  0xB4                                      //Change time here

sbit 	Pulse  = P1^ 0;

/******************************************************************************/
/*                               main routine area                                 */
/******************************************************************************/
void main( void ) {

      Pulse = 0;                                  
	
      timer0_init ();			// Init timer0
      while(1) {                                     // Repeat at here
      }
}
/******************************************************************************/
/*                          timer0 interrupt routine area                             */
/******************************************************************************/
void int_timer0(void) interrupt 1 {
	TF0 = 0;
	TR0 = 0;

	Pulse = ~Pulse;

	TH0 = time_high;
	TL0 = time_low;
	TR0 = 1;
}
/******************************************************************************/
/*                                Init function  area                                      */
/******************************************************************************/
void timer0_init( void ) {
	TMOD &= 0xF0;
	TMOD |= 0x10;
	TH0 = time_high;
	TL0 = time_low;
	ET0 = 1;
	EA = 1;
	TR0 = 1;
}