#define FL 6
#define RL 7
#define LL 9
#define BL 8
#define SpeakerPin 10
int i;

void setup()
{
  pinMode(SpeakerPin, OUTPUT);
  pinMode(FL, OUTPUT);
  pinMode(RL, OUTPUT);
  pinMode(LL, OUTPUT);
  pinMode(BL, OUTPUT);
}

void loop()
{
  digitalWrite(FL, 0);
  digitalWrite(RL, 0);
  digitalWrite(LL, 0);
  digitalWrite(BL, 0);
  for (i = 500; i < 1000; i += 10)
  {
    tone(SpeakerPin, i);
    delay(5);
  }

  digitalWrite(FL, 1);
  digitalWrite(RL, 1);
  digitalWrite(LL, 1);
  digitalWrite(BL, 1);
  for (i = 1000; i >500; i -= 10)
  {
    tone(SpeakerPin, i);
    delay(5);
  }

 
}