#include "p33Fxxxx.h"

int main(void)
{
	int valport, contor;

    TRISB = 0x0000;
    PORTB  = 0x0000;
	
	while(1)
		{
		for(contor=0;contor<0xFFFF;contor++)	;	// intirziere
		valport = PORTB;
		valport = valport ^ 0xF000;	// complementeaza iesirile
		PORTB = valport;
		}
}