Lab 5: Illuminated Jewelry Holder

Description
For this week's lab, I was inspired by lighted jewelry boxes. I created a jewelry holder that mimics this effect and lights up once jewelry is placed on the stand. Once you place bracelets on the jewelry holder, a photocell is blocked from light and a blue LED illuminates the glass of the holder. 
 
https://vimeo.com/77006870
 
Components
1- Arduino Uno
1- USB Cable
1- Breadboard
1-10K Ohm resistor
1- Photocell
1- Blue LED
6- Jumper wires
1- Plastic cup
 
Code
/*Lab 5 Kristina Hart
LED Jewelry holder
*/
 
void setup() {
  // initialize serial communications (for debugging only):
  Serial.begin(9600);
 
}
 
void loop() {
  // read the sensor:
  int ledPin = 13;
  pinMode(ledPin, OUTPUT);
  int sensorReading = analogRead(A0);
  int val = analogRead(0);
  Serial.write(sensorReading);
  // print the sensor reading so you know its range
  Serial.println(sensorReading);
  
   val = map(val, 0, 1023, 0, 99); 
 
if (val <= 80) {
  digitalWrite(ledPin, HIGH);
}
else {
  digitalWrite(ledPin, LOW);
}
}