int led1 = 4;
int led2 = 5;
int btn = 6;



void setup() {
  pinMode(led1, OUTPUT);
  pinMode(led2,  OUTPUT);
  pinMode(btn, INPUT);

}

void loop() {
 if (digitalRead(btn) == LOW) {
  digitalWrite(led1, HIGH);
  digitalWrite(led2, LOW);
  delay(14000);
  digitalWrite(led2, HIGH);
  digitalWrite(led1, LOW);
  delay(14000);
  
 } if (digitalRead(btn) ==HIGH) {
  digitalWrite (led1,LOW);
  digitalWrite(led2,  HIGH);
  }
}