void setup() {
  // put your setup code here, to run once:
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(2, INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  int switchState = digitalRead(2);

  if (switchState=LOW){
    digitalWrite(3, HIGH);
    digitalWrite(4, LOW);
    digitalWrite(5, LOW);
  } 
  else{
    digitalWrite(3, LOW);
    digitalWrite(4, HIGH);
    digitalWrite(5, HIGH);
  }
  delay(500);
  digitalWrite(4, HIGH);
  digitalWrite(5,LOW);
  delay(250);
}