/** Header Files ***************************************************/     
#include <p18f4520.h>

/** Configuration Bits *********************************************/     
#pragma config OSC = EC  // EC = External 4MHz Crystal for PICDEM
#pragma config WDT = OFF
#pragma config LVP = OFF
#pragma config BOREN = OFF
#pragma config XINST = OFF
	
/*******************************************************************
* Function:        void main(void)
********************************************************************/
#pragma code
void main (void)
{
  ADCON1 = 0x0F;
  TRISA = 0b00010001;
  TRISB = 0x00;
  while (1) {
    PORTB = !PORTAbits.RA0 + !PORTAbits.RA4;
  }
}