bool state=LOW;

void setup(){
  pinMode(4,INPUT_PULLUP);
  pinMode(13,OUTPUT);
  pinMode(14,OUTPUT);
}

void loop(){
  if(!digitalRead(4)){
    delay(50);
    if(!digitalRead(4)){
      state=!state;
      while(!digitalRead(4));
    }
  digitalWrite(13,state);
  digitalWrite(14,!state);
  }
}