Lab 4: Force Sensitive Resistors and Photocells

Description
For this week's lab we used photocells and FSRs to initially control our LEDs. For my assignment I customized  the Reflection sketch of Simon Greenwold. Instead of changing the reflection by moving the mouse, I controlled the "brightness" of the sphere using analog sensors: the photocell and the force sensitive resistor.
Here's the youtube link to my code:
https://www.youtube.com/watch?v=eK6zei_hWQ4
 
Components
1 Arduino Uno
1 Breadboard
1 force sensitive resistor/ photocells
1 10k resistor
1 220 Ohm resistor
cables
 
Code
Arduino
/*
 * one sensor (photocell/force sensitive resistor) pot fades one led
 * modified version of AnalogInput
 * by DojoDave <http://www.0j0.org>
 * http://www.arduino.cc/en/Tutorial/AnalogInput
 */

int sensorPin = 0;   // select the input pin for the potentiometer
int ledPin = 9;   // select the pin for the LED
int sensor_val = 0;      // variable to store the value coming from the sensor
void setup() {
  Serial.begin(9600);
}
void loop() {
  sensor_val = analogRead(sensorPin);    // read the value from the sensor, between 0 - 1024
  Serial.println(sensor_val);
  analogWrite(ledPin, sensor_val/4); // analogWrite can be between 0-255
}
Processing
/*
I customized the Reflection sketch of Simon Greenwold. Instead of changing the reflection by moving the mouse,
I controlled the "brightness" of the sphere using analog sensors: the photocell and the force sensitive resistor.
*/

import processing.serial.*;
// Change this to the portname your Arduino board
String portname = "/dev/tty.usbmodemfa131"; // or "COM5"
Serial port;

void setup() {
  size(640, 360, P3D);
  noStroke();
  colorMode(RGB, 1);
  fill(0.4);
  import processing.serial.*;
  port = new Serial(this, portname, 9600);
  // don't generate a serialEvent() unless you get a newline character:
  port.bufferUntil('\n');
}

void draw() {
  background(0);
  translate(width / 2, height / 2);
  // Set the specular color of lights that follow
  lightSpecular(1, 1, 1);
  directionalLight(0.8, 0.8, 0.8, 0, 0, -1);
   sphere(120);
}

void serialEvent (Serial port) {
  // get the ASCII string:
  String inString = port.readStringUntil('\n');
  if (inString != null) {
  // trim off any whitespace:
  inString = trim(inString);
  // convert to an int and map to the screen height:
  float inByte = float(inString);
  inByte = map(inByte, 0, 1023, 0, height);
  println (inByte);
  float s = inByte/ float (height);  
  specular(s, s, s);  
 }
 }