void setup() {
  // put your setup code here, to run once:
// setup 5 digitalPins using pinMode
pinMode(1, OUTPUT);
pinMode(2, OUTPUT);
pinMode(3, OUTPUT);
pinMode(4, OUTPUT);
pinMode(5, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:

//line codes for LEDs to lights ON one by one every 1/2 a second
digitalWrite(1, HIGH); delay(500);
digitalWrite(2, HIGH); delay(500);
digitalWrite(3, HIGH); delay(500);
digitalWrite(4, HIGH); delay(500);
digitalWrite(5, HIGH); delay(500);

//line codes for LEDs to lights OFF one by one every 1/2 a second
digitalWrite(1, LOW); delay(500);
digitalWrite(2, LOW); delay(500);
digitalWrite(3, LOW); delay(500);
digitalWrite(4, LOW); delay(500);
digitalWrite(5, LOW); delay(500);

//line codes for ALL LEDs to lights ON with an interval of 1/2 a second
digitalWrite(1, HIGH); 
digitalWrite(2, HIGH); 
digitalWrite(3, HIGH); 
digitalWrite(4, HIGH); 
digitalWrite(5, HIGH); delay(500);

//line codes for ALL LEDs to lights OFF with an interval of 1/2 a second
digitalWrite(1, LOW); 
digitalWrite(2, LOW); 
digitalWrite(3, LOW); 
digitalWrite(4, LOW); 
digitalWrite(5, LOW); delay(500);

}