int l1=0;
int l2=1;
int l3=2;
int l4=3;
int l5=4;
int l6=5;
void setup() {
  // put your setup code here, to run once:
pinMode(l1, OUTPUT);
pinMode(l2, OUTPUT);
pinMode(l3, OUTPUT);
pinMode(l4, OUTPUT);
pinMode(l5, OUTPUT);
pinMode(l6, OUTPUT);


}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(l1,HIGH);
delay(100);
digitalWrite(l1,LOW);

digitalWrite(l2,HIGH);
delay(100);
digitalWrite(l2,LOW);

digitalWrite(l3,HIGH);
delay(100);
digitalWrite(l3,LOW);

digitalWrite(l4,HIGH);
delay(100);
digitalWrite(l4,LOW);

digitalWrite(l5,HIGH);
delay(100);
digitalWrite(l5,LOW);

digitalWrite(l6,HIGH);
delay(100);
digitalWrite(l6, LOW);
delay(500);


}