/*Multi line
comment 
will be ignored
*/

int yellow = 13;
int green = 12;
int red = 11;
int blue = 10;
int orange = 9;

void setup() {

  pinMode(yellow, OUTPUT);
  pinMode(green, OUTPUT);
  pinMode(red, OUTPUT);
  pinMode(blue, OUTPUT);
  pinMode(orange, OUTPUT);
}

void loop() {
digitalWrite(yellow, HIGH);
digitalWrite(green, HIGH);
digitalWrite(red, HIGH);
digitalWrite(blue, HIGH);
digitalWrite(orange, HIGH);
delay(1000);//a delay of 1000 miliseconds

digitalWrite(yellow, LOW);
digitalWrite(green, LOW);
digitalWrite(red, LOW);
digitalWrite(blue, LOW);
digitalWrite(orange, LOW);
delay(1000);
}