void setup()
{
 pinMode (photoPin, INPUT);
 pinMode (piezoPin, OUTPUT);
 Serial.begin (9600);

}


void loop()
{
 photoVal = analogRead (photoPin);
 photoVal = map (photoVal, Min, Max, 50, 560);
 tone (piezoPin, photoVal, 20);
 noTone (piezoPin);
 delay (100);

}

unsigned long = Mytime  =0;
int minVal =1000;
int maxVal = 0;

Serial.print ("Max =");
Serial.print (maxVal);
minVal = 1000;
maxVal =0;
Mytime = millis ();
while (millis ()-
Serial.print ("Min =