int i,K;

void setup() {
  // put your setup code here, to run once:
  pinMode(30,OUTPUT);
  pinMode(31,OUTPUT);
  pinMode(32,OUTPUT);
  pinMode(33,OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
    for(int i=12; i >= 0; i--){
    PORTC=B10000000; delay(10);
    PORTC=B01000000; delay(10);
    PORTC=B00100000; delay(10);
    PORTC=B00010000; delay(10);
  }
  delay(1000);
    for(int i=12; i >= 0; i--){
    PORTC=B10000000; delay(10);
    PORTC=B01000000; delay(10);
    PORTC=B00100000; delay(10);
    PORTC=B00010000; delay(10);
  }
  delay(1000);
    for(int K=0; K<=24; K++){
    PORTC=B00010000; delay(10);
    PORTC=B00100000; delay(10);
    PORTC=B01000000; delay(10);
    PORTC=B10000000; delay(10);
  } 
  delay(1000);
  for(int K=0; K<=24; K++){
    PORTC=B00010000; delay(10);
    PORTC=B00100000; delay(10);
    PORTC=B01000000; delay(10);
    PORTC=B10000000; delay(10);
  } 
  delay(1000);
}