const int LED1 = 13;
const int LED2 = 12;
const int LED3 = 11;
const int LED4 = 10;
const int LED5 = 9;
const int LED6 = 8;

void setup(){
pinMode(LED1, OUTPUT);
pinMode(LED2, OUTPUT);
pinMode(LED3, OUTPUT);
pinMode(LED4, OUTPUT);
pinMode(LED5, OUTPUT);
pinMode(LED6, OUTPUT);

}
void loop(){
digitalWrite(LED1, HIGH);
delay(50);
digitalWrite(LED2, HIGH);
delay(50);
digitalWrite(LED3, HIGH);
delay(50);
digitalWrite(LED4, HIGH);
delay(50);
digitalWrite(LED5, HIGH);
delay(50);
digitalWrite(LED6, HIGH);
delay(50);
digitalWrite(LED1, LOW);
delay(25);
digitalWrite(LED2, LOW);
delay(25);
digitalWrite(LED3, LOW);
delay(25);
digitalWrite(LED4, LOW);
delay(25);
digitalWrite(LED5, LOW);
delay(25);
digitalWrite(LED6, LOW);
delay(25);
digitalWrite(LED1, HIGH);
delay(100);
digitalWrite(LED2, HIGH);
delay(100);
digitalWrite(LED3, HIGH);
delay(100);
digitalWrite(LED4, HIGH);
delay(100);
digitalWrite(LED5, HIGH); 
delay(100);
digitalWrite(LED6, HIGH); 
delay(100);
digitalWrite(LED1, LOW); 
delay(50);
digitalWrite(LED2, LOW);
delay(50);
digitalWrite(LED3, LOW); 
delay(50);
digitalWrite(LED4, LOW); 
delay(50);
digitalWrite(LED5, LOW); 
delay(50);
digitalWrite(LED6, LOW);
delay(50);

return 0;

}