int potPin = A3; // Potentiometer output connected to analog pin 3
int potVal = 0; // Variable to store the input from the potentiometer


int redPin = 9;   // Red LED,   
int grnPin = 10;  // Green LED,
int bluPin = 11;  // Blue LED,  


int redVal = 0;   
int grnVal = 0;
int bluVal = 0;

void setup()
{
  pinMode(redPin, OUTPUT);  
  pinMode(grnPin, OUTPUT);   
  pinMode(bluPin, OUTPUT); 
}


void loop()
{
  potVal = analogRead(potPin);   

  if (potVal < 341)  
  {                  
   digitalWrite(redPin, HIGH); 
   digitalWrite(grnPin, LOW); 
   digitalWrite(bluPin, LOW);  
  }
  else if (potVal < 682) 
  {
    digitalWrite(redPin,LOW ); 
   digitalWrite(grnPin, HIGH); 
   digitalWrite(bluPin, LOW);  
  }
  else  
  {
     digitalWrite(redPin,LOW ); 
   digitalWrite(grnPin,LOW ); 
   digitalWrite(bluPin, HIGH);  
  }
 
}