int led1=13;
int led2=8;
int led3=6;
int led4=5;
int led5=4;
int led6=2;
int led7=3;

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);
pinMode(led6, OUTPUT);
pinMode(led7, OUTPUT);

}

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

digitalWrite(led1, HIGH);
digitalWrite(led2, HIGH);
digitalWrite(led3,HIGH);
 delay(1000);

digitalWrite(led4, HIGH);
digitalWrite(led5, HIGH);
digitalWrite(led6, HIGH);
digitalWrite(led7, HIGH);
delay(1500);

digitalWrite(led1, LOW);
digitalWrite(led2, LOW);
digitalWrite(led3, LOW);
delay(4000);

digitalWrite(led4, LOW);
digitalWrite(led5,LOW);
digitalWrite(led6, LOW);
digitalWrite(led7, LOW);
 delay(4500);

 //end
}