#define L1 25
#define L2 33
#define L3 32
#define L4 23
#define L5 22
#define L6 21
#define L7 19
#define L8 18
#define L9 5
#define L10 4
#define L11 2
#define L12 15

void setup() {
  pinMode(L1, OUTPUT);
  pinMode(L2, OUTPUT);
  pinMode(L3, OUTPUT);
  pinMode(L4, OUTPUT);
  pinMode(L5, OUTPUT);
  pinMode(L6, OUTPUT);
  pinMode(L7, OUTPUT);
  pinMode(L8, OUTPUT);
  pinMode(L9, OUTPUT);
  pinMode(L10, OUTPUT);
  pinMode(L11, OUTPUT);
  pinMode(L12, OUTPUT);
}


void loop() {
  digitalWrite(L1, HIGH);
  delay(500);
  digitalWrite(L1, LOW);
  digitalWrite(L2, HIGH);
  delay(500);
  digitalWrite(L2, LOW);
  digitalWrite(L3, HIGH);
  delay(500);
  digitalWrite(L3, LOW);  
  digitalWrite(L4, HIGH);
  delay(500);
  digitalWrite(L4, LOW);  
  digitalWrite(L5, HIGH);
  delay(500);
  digitalWrite(L5, LOW);
  digitalWrite(L6, HIGH);
  delay(500);
  digitalWrite(L6, LOW);
  digitalWrite(L7, HIGH);
  delay(500);
  digitalWrite(L7, LOW);
  digitalWrite(L8, HIGH);
  delay(500);
  digitalWrite(L8, LOW);
  digitalWrite(L9, HIGH);
  delay(500);
  digitalWrite(L9, LOW);
  digitalWrite(L10, HIGH);
  delay(500);
  digitalWrite(L10, LOW);
  digitalWrite(L11, HIGH);
  delay(500);
  digitalWrite(L11, LOW);              
  digitalWrite(L12, HIGH);
  delay(500);
  digitalWrite(L12, LOW);  

}