int redpin = 11;    // select the input pin for the potentiometer



int bluepin =10;      // select the pin for the LED



int yellowpin =9;



int val;



 



void setup() {



  pinMode(redpin, OUTPUT);



  pinMode(bluepin, OUTPUT);



  pinMode(yellowpin, OUTPUT);



  Serial.begin(9600);



}



 



void loop() 



{



for(val=255; val>0; val--)



  {



   analogWrite(11, val);



   analogWrite(10, 255-val);



   analogWrite(9, 128-val);



   delay(1); 



  }



for(val=0; val<255; val++)



  {



   analogWrite(11, val);



   analogWrite(10, 255-val);



   analogWrite(9, 128-val);



   delay(1); 



  }



 Serial.println(val, DEC);



}