int led1 = 13;
int led2 =12;
int led3 =11;
int led4 =10;
int led5 =9;
int led6 =8;
int led7 =7;
int led8 =6;
int led9 =5;

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);
  pinMode(led8, OUTPUT);
  pinMode(led9, OUTPUT);
}
void loop() {
  digitalWrite(led1, HIGH);
  delay(1000);
  digitalWrite(led1, LOW);
  
  // Turn on LED 2, delay, then turn off  
  digitalWrite(led2, HIGH);
  delay(1000);
  digitalWrite(led2, LOW);
  
  // Turn on LED 3, delay, then turn off
  digitalWrite(led3, HIGH);
  delay(1000);
  digitalWrite(led3, LOW);

  digitalWrite(led4, HIGH );
  delay(1000);
  digitalWrite(led4, LOW);

  digitalWrite(led5, HIGH );
  delay(1000);
  digitalWrite(led5, LOW);

  digitalWrite(led6, HIGH );
  delay(1000);
  digitalWrite(led6, LOW);

  digitalWrite(led7, HIGH );
  delay(1000);
  digitalWrite(led7, LOW);

  digitalWrite(led8, HIGH );
  delay(1000);
  digitalWrite(led8, LOW);

  digitalWrite(led9, HIGH );
  delay(1000);
  digitalWrite(led9, LOW);



}