const int redPin = 0;
const int greenPin = 1;
const int bluePin = 2;
const int analin = 4; 

void setup() {
  // put your setup code here, to run once:
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(bluePin, OUTPUT);
  pinMode(3, OUTPUT);
  pinMode(analin, INPUT);
}
int counter;
void loop() {
  // put your main code here, to run repeatedly:
  if(counter>200){
    counter=0;
  }
  //analogWrite(0,counter);
  //counter++;

  for (int i = 0; i < 3; i++){
    digitalWrite(i, LOW);
  }
if( analogRead(analin) > 100){

   for (int r = 0; r <= 255; r++) {
    analogWrite(redPin, r);
    analogWrite(greenPin, 255 - r);
    digitalWrite(bluePin, LOW);
    delay(100);
  }

  for (int g = 0; g <= 255; g++) {
    analogWrite(redPin, 255 - g);
    analogWrite(greenPin, g);
    digitalWrite(bluePin, LOW);
    delay(100);
  }

  for (int b = 0; b <= 255; b++) {
    analogWrite(redPin, 0);
    analogWrite(greenPin, 255 - b);
    digitalWrite(bluePin, HIGH);
    delay(100);
  }
} else {
    analogWrite(redPin, 0);
    analogWrite(greenPin, 0);
    analogWrite(bluePin, 0);   
}


 }