void setup() {
  // put your setup code here, to run once:
  pinMode(2, OUTPUT);
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);

}

void loop() {
 analogWrite(2,255);
analogWrite(3,150);
analogWrite(4,0);
delay(3100);
analogWrite(2,0);
analogWrite(3,255);
analogWrite(4,120);
delay(3100);
analogWrite(2,100);
analogWrite(3,0);
analogWrite(4,255);
delay(3100);
analogWrite(2,150);
analogWrite(3,150);
analogWrite(4,150);
delay(3100);
}