   writeRegister(pcaMode1, B00100000);
   writeRegister(pcaMode2, B00000100);
 }
-  
+
 void writeRegister(byte regAddress, byte regData) {
   Wire.beginTransmission(pcaBaseAddress);
   Wire.write(regAddress);

          setOutputLevel(output++, red);
          setOutputLevel(output++, green);
          setOutputLevel(output++, blue);
        }      
      }
      Serial.println('R');
    } else if (receiveBuffer[0] == 'H') {

// This is done by copying the Wire library to the Arduino
// 'libraries' folder and editing the 'utility/twi.h' file.
#include <Wire.h>
#include <avr/pgmspace.h>

const byte
  pcaBaseAddress = 0x40,
