int switchState = 0;
void setup()
{
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(2, INPUT);
}
void loop()
{
  switchState = digitalRead (2);
 if (switchState == LOW) {
  //the button is not pressed
  digitalWrite(3, HIGH);
  digitalWrite(4, LOW);
  digitalWrite(5, LOW);
 }
 else {
   // the button is pressed
  digitalWrite(3, LOW);
  digitalWrite(4, LOW);
  digitalWrite(5, HIGH);
  delay (250); // wait for a quarter second
 // toggle the LEDs 
 digitalWrite(4, HIGH);
 digitalWrite(5, LOW);
 delay(250); // wait for quarter second
 
 }
} // go back to the beginning of the loop