int Pin_led1 = 2;
int Pin_led2 = 3;
int Pin_led3 = 4;
int Pin_led4 = 5;
int Pin_led5 = 6;
int Pin_led6 = 7;
int Pin_led7 = 8;
int Pin_led8 = 9;
int Pin_led9 = 10;
int Pin_led10 = 11;

void setup() {
  pinMode (Pin_led1,OUTPUT);
  pinMode (Pin_led2,OUTPUT);
  pinMode (Pin_led3,OUTPUT);
  pinMode (Pin_led4,OUTPUT);
  pinMode (Pin_led5,OUTPUT);
  pinMode (Pin_led6,OUTPUT);
  pinMode (Pin_led7,OUTPUT);
  pinMode (Pin_led8,OUTPUT);
  pinMode (Pin_led9,OUTPUT);
  pinMode (Pin_led10,OUTPUT);
}
void loop() {
  digitalWrite(Pin_led1,HIGH);
  digitalWrite(Pin_led2,HIGH);
  delay(1000);
  digitalWrite(Pin_led3,HIGH);
  digitalWrite(Pin_led4,HIGH);
  delay(1000);
  digitalWrite(Pin_led5,HIGH);
  digitalWrite(Pin_led6,HIGH);
  delay(1000);
  digitalWrite(Pin_led7,HIGH);
  digitalWrite(Pin_led8,HIGH);
  delay(1000);
  digitalWrite(Pin_led9,HIGH);
  digitalWrite(Pin_led10,HIGH);
  delay(1000);
  digitalWrite(Pin_led10,LOW);
  delay(500);
  digitalWrite(Pin_led9,LOW);
  delay(500);
  digitalWrite(Pin_led8,LOW);
  delay(500);
  digitalWrite(Pin_led7,LOW);
  delay(500);
  digitalWrite(Pin_led6,LOW);
  delay(500);
  digitalWrite(Pin_led5,LOW);
  delay(500);
  digitalWrite(Pin_led4,LOW);
  delay(500);
  digitalWrite(Pin_led3,LOW);
  delay(500);
  digitalWrite(Pin_led2,LOW);
  delay(500);
  digitalWrite(Pin_led1,LOW);
  delay(500);
  digitalWrite(Pin_led1,HIGH);
  digitalWrite(Pin_led10,HIGH);
  delay(500);
  digitalWrite(Pin_led2,HIGH);
  digitalWrite(Pin_led9,HIGH);
  delay(500);
  digitalWrite(Pin_led3,HIGH);
  digitalWrite(Pin_led8,HIGH);
  delay(500);
  digitalWrite(Pin_led4,HIGH);
  digitalWrite(Pin_led7,HIGH);
  delay(500);
  digitalWrite(Pin_led5,HIGH);
  digitalWrite(Pin_led6,HIGH);
  delay(500);
  digitalWrite(Pin_led1,LOW);
  digitalWrite(Pin_led10,LOW);
  delay(1000);
  digitalWrite(Pin_led2,LOW);
  digitalWrite(Pin_led9,LOW);
  delay(1000);
  digitalWrite(Pin_led3,LOW);
  digitalWrite(Pin_led8,LOW);
  delay(1000);
  digitalWrite(Pin_led4,LOW);
  digitalWrite(Pin_led7,LOW);
  delay(1000);
  digitalWrite(Pin_led5,LOW);
  digitalWrite(Pin_led6,LOW);
  delay(1000);
}