3D Light Up Brain Model

/* Basic Digital Read
 * ------------------ 
 *
 * turns on and off a light emitting diode(LED) connected to digital  
 * pin 13, when pressing a pushbutton attached to pin 7. It illustrates the
 * concept of Active-Low, which consists in connecting buttons using a
 * 1K to 10K pull-up resistor.
 *
 * Created 1 December 2005
 * copyleft 2005 DojoDave <http://www.0j0.org>
 * http://arduino.berlios.de
 *
 */

int ledPinred = 13; // choose the pin for the LED
int inPinred = 7;   // choose the input pin (for a pushbutton)
int valred = 0;     // variable for reading the pin status
int ledPinwhite = 8; // choose the pin for the LED
int inPinwhite = 4;   // choose the input pin (for a pushbutton)
int valwhite = 0;     // variable for reading the pin status
int ledPingreen = 10; // choose the pin for the LED
int inPingreen = 5;   // choose the input pin (for a pushbutton)
int valgreen = 0;     // variable for reading the pin status
int ledPinyell = 12; // choose the pin for the LED
int inPinyell = 6;   // choose the input pin (for a pushbutton)
int valyell = 0;     // variable for reading the pin status


void setup() {
  pinMode(ledPinred, OUTPUT);  // declare LED as output
  pinMode(inPinred, INPUT);    // declare pushbutton as input
  pinMode(ledPinwhite, OUTPUT);  // declare LED as output
  pinMode(inPinwhite, INPUT);    // declare pushbutton as input
  pinMode(ledPingreen, OUTPUT);  // declare LED as output
  pinMode(inPingreen, INPUT);    // declare pushbutton as input
  pinMode(ledPinyell, OUTPUT);  // declare LED as output
  pinMode(inPinyell, INPUT);    // declare pushbutton as input
}

void loop(){
  valred = digitalRead(inPinred);  // read input value
  if (valred == HIGH) {         // check if the input is HIGH (button released)
    digitalWrite(ledPinred, LOW);  // turn LED OFF
  } else {
    digitalWrite(ledPinred, HIGH);  // turn LED ON
  }
  valwhite = digitalRead(inPinwhite);  // read input value
  if (valwhite == HIGH) {         // check if the input is HIGH (button released)
    digitalWrite(ledPinwhite, LOW);  // turn LED OFF
  } else {
    digitalWrite(ledPinwhite, HIGH);  // turn LED ON
  }
  valgreen = digitalRead(inPingreen);  // read input value
  if (valgreen == HIGH) {         // check if the input is HIGH (button released)
    digitalWrite(ledPingreen, LOW);  // turn LED OFF
  } else {
    digitalWrite(ledPingreen, HIGH);  // turn LED ON
  }
  valyell = digitalRead(inPinyell);  // read input value
  if (valyell == HIGH) {         // check if the input is HIGH (button released)
    digitalWrite(ledPinyell, LOW);  // turn LED OFF
  } else {
    digitalWrite(ledPinyell, HIGH);  // turn LED ON
  }
}