#include <p18f4580.h>
#define mybit PORTBbits.RB4
void main(void)
  { 
    	TRISBbits.TRISB4=0;	
    	T2CON=0x0;			
    	TMR2=0x00;			
	mybit=0;			
   	PR2=100;			
    	T2CONbits.TMR2ON=1;	
    	while(PIR1bits.TMR2IF==0);	
    	mybit=1;			
	T2CONbits.TMR2ON=0;	
    	PIR1bits.TMR2IF=0;	
	while(1);			
  }