int pinLED[] = {0,1,2,3,4,5,6,7};
 void setup() 
{
 for(int pin=0;pin<8;pin++)
 {
 pinMode(pinLED[pin], OUTPUT);
 }
  }
 void loop() 
{
 led_nyala_semua();
 delay(200);                       
 led_padam_semua();
 delay(200);   
 led_nyala_semua();
 delay(200);                       
 led_padam_semua();
 delay(200);
 led_geser_kiri();
 delay(200);                       
}
 void led_nyala_semua()
 {
 for(int pin=0;pin<8;pin++)
 {
 digitalWrite(pinLED[pin], HIGH);
 } 
}
 void led_padam_semua()
 {
 for(int pin=0;pin<8;pin++)
 {
 digitalWrite(pinLED[pin], LOW);
 }  
}
 void led_geser_kiri()
 {
 for(int pin=0;pin<8;pin++)
 {
 digitalWrite(pinLED[pin], HIGH);
 delay(100);
 digitalWrite(pinLED[pin], LOW);
 delay(100);
 }  
}