#pragma config OSC = HS, OSCS = OFF
	#pragma config PWRT = OFF, BOR = ON, BORV = 45
	#pragma config WDT = OFF, LVP = OFF
	#pragma config DEBUG = OFF, STVR = OFF
	#include <P18F458.h>
	void msdelay(unsigned int ms);
	void main(void)
	  {
	    TRISB = 0;			
	    while(1)
	      {
	      PORTB = 0x55;
	      msdelay(500);
	      PORTB = 0xAA;
	      msdelay(500);
	      }
	  }
	
	void msdelay(unsigned int ms)
	  {
	  unsigned int x; 
	  unsigned char z;
	  for(x=0;x<ms;x++)
	    for(z=0;z<165;z++);
	  }