int led = 3;
int led1 = 4;
int button = 7;

void setup() {
  pinMode(led, OUTPUT);
pinMode(led1, OUTPUT);
pinMode(button, INPUT);
}

void loop() {
  int data = digitalRead(button);
  if (data == HIGH){
  digitalWrite(led, HIGH);
  digitalWrite(led1, LOW);
  } else {
digitalWrite(led, LOW);
digitalWrite(led1, HIGH);
  }
}