Hand Glove Light Theremin

//sensor value and its limits
int sensorValue;
int sensorLow = 1023;
int sensorHigh = 0;

//for connection checking, no need to put the led in the actual circuit
const int ledPin= 13;

void setup() {
  pinMode(ledPin, OUTPUT);
  digitalWrite(ledPin, HIGH);
  while (millis() < 5000) {
    sensorValue = analogRead(A0);
          if (sensorValue > sensorHigh) {
                    sensorHigh = sensorValue;
          }
          if (sensorValue < sensorLow) {
                    sensorLow = sensorValue;
          }
  }//end of while.
  digitalWrite(ledPin, LOW);
 }

void loop() { 
  sensorValue = analogRead(A0);

  int pitch = map(sensorValue, sensorLow, sensorHigh, 50, 4000);
  // I connected the piezo in digital 5
  tone(5,pitch,20);
  delay(10);

}