int Rled = 3;
int Gled= 5;
int Bled = 6;
int switchpin = 2;
int switchstate =0;
void setup() {
  pinMode(Rled, OUTPUT);
  pinMode(Gled, OUTPUT);
  pinMode(Bled, OUTPUT);
  pinMode(switchpin, INPUT);
}

void loop() {
  switchstate = digitalRead(switchpin);
  if (switchpin == LOW)
  {
    
    analogWrite(Rled,255);
    analogWrite(Gled,50);
    analogWrite(Bled,50);
    delay(1000);
    analogWrite(Rled,50);
    analogWrite(Gled,255);
    analogWrite(Bled,50);
    delay(1000);
    analogWrite(Rled,50);
    analogWrite(Gled,50);
    analogWrite(Bled,255);
    delay(1000);
  }
  else{
   
   analogWrite(Rled,50);
   analogWrite(Gled,255);
   analogWrite(Bled,50);
   delay(1000);
   analogWrite(Rled,50);
   analogWrite(Gled,50);
   analogWrite(Bled,255);
   delay(1000);
   analogWrite(Rled,255);
   analogWrite(Gled,50);
   analogWrite(Bled,50);
   delay(1000); 
  }
  
}