Dimming the wordclock

int ledPin = 9;    // LED connected to digital pin 9
 
// shift register stuff
const int g_pinCommLatch = 40;
const int g_pinData = 41;
const int g_pinClock = 42;
const int g_registers = 1;
byte g_registerArray[g_registers];
 
// Simple function to send serial data to one or more shift registers by iterating backwards through an array.
// Although g_registers exists, they may not all be being used, hence the input parameter.
void sendSerialData (
  byte registerCount,  // How many shift registers?
  byte *pValueArray)   // Array of bytes with LSByte in array [0]
{
  // Signal to the 595s to listen for data
  digitalWrite (g_pinCommLatch, LOW);
 
  for (byte reg = registerCount; reg > 0; reg--) {
    byte value = pValueArray [reg - 1];
    for (byte bitMask = 128; bitMask > 0; bitMask >>= 1) {
      digitalWrite(g_pinClock, LOW);
      digitalWrite(g_pinData, value & bitMask ? HIGH : LOW);
      digitalWrite(g_pinClock, HIGH);
    }
  }
  // Signal to the 595s that I'm done sending
  digitalWrite (g_pinCommLatch, HIGH);
}  // sendSerialData
 
void setup()
{
  pinMode (g_pinCommLatch, OUTPUT);
  pinMode (g_pinClock, OUTPUT);
  pinMode (g_pinData, OUTPUT);
 
  g_registerArray[0] = 254;
  sendSerialData (g_registers, g_registerArray);
} // setup
 
int c = 2;
 
void loop()
{
  g_registerArray[0] = c;
  sendSerialData (g_registers, g_registerArray);
  c *= 2;
  if (c > 128) {
    c = 2;
  }
  // fade in from min to max in increments of 5 points:
  for(int fadeValue = 0 ; fadeValue = 0; fadeValue -=5) { 
    // sets the value (range from 0 to 255):
    analogWrite(ledPin, fadeValue);         
    // wait for 30 milliseconds to see the dimming effect    
    delay(30);                            
  } 
} // loop