int l1 = 1;
int l2 = 2;
int l3 = 3;
int l4 = 4;
int l5 = 5;

void setup() {
  pinMode(l1,OUTPUT);
pinMode(l2,OUTPUT);
pinMode(l3,OUTPUT);
}
 
void loop() {
 digitalWrite(l1,HIGH);
 delay(1000);
 digitalWrite(l1,LOW);
 delay(1000);
 digitalWrite(l2,HIGH);
 delay(1000);
 digitalWrite(l2,LOW);
 delay(1000);
 digitalWrite(l3,HIGH);
 delay(1000);
 digitalWrite(l3,LOW);
 delay(1000);
 digitalWrite(l4,HIGH);
 delay(1000);
 digitalWrite(l4,LOW);
 delay(1000);
 digitalWrite(l5,HIGH);
 delay(1000);
 digitalWrite(l5,LOW);
 delay(1000);
  


//digitalWrite(l1,HIGH);
//delay(1000);
//digitalWrite(l1,LOW);
//delay(1000);
 digitalWrite(l4,HIGH);
 delay(1000);
 digitalWrite(l4,LOW);
 delay(1000);
 digitalWrite(l3,HIGH);
 delay(1000);
 digitalWrite(l3,LOW);
 delay(1000);
 digitalWrite(l2,HIGH);
 delay(1000);
 digitalWrite(l2,LOW);
 delay(1000);
 digitalWrite(l1,HIGH);
 delay(1000);
 digitalWrite(l1,LOW);
 delay(1000);
}