char LED_pin[] = {10,11,12,13};
void send2port(byte data);
void setup()
{
  Serial.begin(9600);
  for(char i=0;i<4;i++)
  {
    pinMode(LED_pin[i],OUTPUT);  
  }
}
void loop()
{
  send2port(0B1000);
  delay(500);
  send2port(0B0100);
  delay(800);
  send2port(0B0010);
  delay(1300);
  send2port(0B0001);
  delay(1800);  
}
void send2port(byte data)
{
  digitalWrite(LED_pin[0],(data & 1 )? HIGH:LOW);
  digitalWrite(LED_pin[1],(data & 2 )? HIGH:LOW);
  digitalWrite(LED_pin[2],(data & 4 )? HIGH:LOW);
  digitalWrite(LED_pin[3],(data & 8 )? HIGH:LOW);
}