int led1=2;
int led2=3;
int led3=4;
int led4=5;
int led5=6;
void setup() {
  //put your setup code here to run once;
  pinMode (led1, OUTPUT);
  pinMode (led2, OUTPUT);
  pinMode (led3, OUTPUT);
  pinMode (led4, OUTPUT);
  pinMode (led5, OUTPUT);
}
void loop() {
  //put your main code here, to run repeatedly;
  digitalWrite(led1, HIGH);
  delay(100);//1 sec delay;
  digitalWrite(led1, LOW);
  delay(100);
    //put your main code here, to run repeatedly;
  digitalWrite(led2, HIGH);
  delay(100);//1 sec delay;
  digitalWrite(led2, LOW);
  delay(100);
    //put your main code here, to run repeatedly;
  digitalWrite(led3, HIGH);
  delay(100);//1 sec delay;
  digitalWrite(led3, LOW);
  delay(100);
    //put your main code here, to run repeatedly;
  digitalWrite(led4, HIGH);
  delay(100);//1 sec delay;
  digitalWrite(led4, LOW);
  delay(100);
    //put your main code here, to run repeatedly;
  digitalWrite(led5, HIGH);
  delay(100);//1 sec delay;
  digitalWrite(led5, LOW);
  delay(100);
}