code 3-2 in black book

const int BLED=9 ;
const int GLED=10 ;
const int RLED=11 ;
const int TEMP=0 ;
const int LOWER_BOUND=146 ;
const int UPPER_BOUND=167 ;
int val = 0 ;
int color=0;
void setup ()
{
  pinMode (BLED, OUTPUT) ;
  pinMode (GLED, OUTPUT) ;
  pinMode (RLED, OUTPUT) ;
  Serial.begin (9600) ;
}
void loop()
{
  val = analogRead(TEMP) ;
  Serial.println(val);
  delay(50) ;
  if (val < LOWER_BOUND+5)
  {
    digitalWrite(RLED, LOW) ;
    digitalWrite(GLED, LOW) ;
    digitalWrite(BLED, HIGH) ;
  }
  else
  {
    color = (val-46)*1.5 ;
    analogWrite(RLED, color) ;
    analogWrite(GLED, 0) ;
    analogWrite(BLED,255-color ) ;
  }
}