int red = 13;
int green = 12;
int button = 11;

int buttonstate = 0 ;


void setup() {
  // put your setup code here, to run once:
  pinMode(red,OUTPUT);
  pinMode(green, OUTPUT);
  pinMode(button, INPUT);

}

void loop() {
  // put your main code here, to run repeatedly:
  buttonstate = digitalRead(button);

  if(buttonstate == 1){
    digitalWrite(red, HIGH);
    digitalWrite(green, LOW);
  }
  else if(buttonstate == 0){
    
    digitalWrite(red, LOW);
    digitalWrite(green, LOW);
  }
}