int button1 = 2;
int button2 = 3;
int button3 = 4;
int led1 = 6;
int led2 = 7;
int led3 = 8;

 void setup() {
 pinMode(button1, INPUT);
 pinMode(button2, INPUT);
 pinMode(button3, INPUT);

pinMode(led1, OUTPUT);
pinMode(led2, OUTPUT);
pinMode(led3, OUTPUT);

}

void loop() {
  int a1 = digitalRead(button1);
  int a2 = digitalRead(button2);
  int a3 = digitalRead(button3);
  if (a1 == 1){
    digitalWrite(led1, HIGH);
  }else{
    digitalWrite(led1,LOW);
  }
 
  if (a2 == 1){
    digitalWrite(led2, HIGH);
  }else{
    digitalWrite(led2,LOW);
  }
  
  if (a3 == 1){
    digitalWrite(led3, HIGH);
  }else{
    digitalWrite(led3,LOW);
  }
}