int const led1 = 13;
int const led2 = 12;
int const led3 = 8;
int const button = 7;



void setup() {
  // put your setup code here, to run once:
pinMode(led1,OUTPUT);
pinMode(led2,OUTPUT);
pinMode(led3, OUTPUT);
pinMode(button, INPUT);
Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
int butValue = digitalRead(button);
Serial.println(butValue);
if(butValue == 1){
  digitalWrite(led1, HIGH);
  delay(500);
  digitalWrite(led2, HIGH);
  delay(500);
  digitalWrite(led3, HIGH);
  delay(500);

}
else if(butValue == 0){
  digitalWrite(led1, LOW);
  digitalWrite(led2, LOW);
  digitalWrite(led3, LOW);
  
}
}