at89s52

#include <reg52.h>

 #define ON  0
 #define OFF 1
 sbit LED = P1^2;


void DelayMs(unsigned int msec);

void DelayMs(unsigned int msec)
 {
	 unsigned int x,y;
	 for(x=0; x<=msec;x++)
   {
		 for(y=0;y<=110;y++);
	}
}
  void main(void) {
  for(;;)
   {    LED = ON;
   DelayMs(50);
    LED = OFF;
DelayMs(50);
   }
}