#include <reg51.h>
#include <INTRINS.H> 
#include <STDIO.H>
sbit  yellowLed = P1^0;
int data i=0;
	 
void main()
{
	
	EA=1;
	EX0=1;
	IT0=1;
	


		 while(1)

	  {	
		
		for(i=0;i<50;i++)
			{
			  yellowLed = 0;
			}
					  
	}
}

void  yellow( )  interrupt 0   
{
	
	for(i=0;i<32765;i++){
	yellowLed = 1;
	}


}