void setup() {
  PORTA.DIR |= 0b00110000;//portA 4 pin(Arduino 0 pin)is OUTPUT
  PORTB.DIR |= 0b00000010;//portB 1 pin(Arduino 6 pin)is OUTPUT
}
void loop() {
  PORTA.OUT |= 0b00010000;//portA 4 pin(Arduino 0 pin)is HIGH
  delay(1000);
  PORTA.OUT &= ~0b00010000;//portA 4 pin(Arduino 0 pin)is LOW
  delay(1000);
  
  PORTA.OUT |= 0b00100000;//portA 5 pin(Arduino 1 pin)is HIGH
  delay(500);
  PORTA.OUT &= ~0b00100000;//portA 5 pin(Arduino 1 pin)is LOW
  delay(500);
  
  PORTB.OUT |= 0b00000010;//portB 1 pin(Arduino 6 pin)is HIGH
  delay(100);
  PORTB.OUT &= ~0b00000010;//portB 1 pin(Arduino 6 pin)is LOW
  delay(100);
}