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

}

void loop() {
  analogWrite(2,20);
  delay(1000);
  analogWrite(2,78);
  delay(1000);
  analogWrite(2,150);
  delay(1000);
  analogWrite(2,25);
  delay(1000);
  analogWrite(0,0);
  // put your main code here, to run repeatedly:

}