int redPin = 12;
int bluePin = 4;
int greenPin = 2;

void setup() {
  pinMode(redPin, OUTPUT);
  pinMode(bluePin, OUTPUT);
  pinMode(greenPin, OUTPUT);
}

void loop() {
  //task1a();
  //task1b();
  //task1c();
  //task1d();
  task1e();
  }
  void task1a(){
  digitalWrite(greenPin, HIGH);
  delay(500);
  digitalWrite(greenPin, LOW);
  delay(500);
  }
void task1b(){
  analogWrite(redPin, 255);  
  analogWrite(bluePin, 128);   
  delay(2000);
  digitalWrite(redPin, LOW);
  digitalWrite(bluePin, LOW);
  delay(2000);
}
void task1c(){
  analogWrite(redPin, 255);   
  analogWrite(greenPin, 255);
  analogWrite(bluePin, 255);
  delay(1500);
  digitalWrite(redPin, LOW);
  digitalWrite(greenPin, LOW);
  digitalWrite(bluePin, LOW);
  delay(1500);
}
void task1d(){
  digitalWrite(redPin, HIGH);
  delay(1000);
  digitalWrite(redPin, LOW);
  digitalWrite(greenPin, LOW);
  digitalWrite(bluePin, LOW);
  delay(1000);
}
void task1e(){
  analogWrite(redPin, 255);    
  analogWrite(greenPin, 255);
  analogWrite(bluePin, 0);
  delay(500);
  digitalWrite(redPin, LOW);
  digitalWrite(greenPin, LOW);
  digitalWrite(bluePin, LOW);
  delay(1000);
  analogWrite(redPin, 0);      
  analogWrite(greenPin, 255);
  analogWrite(bluePin, 255);
  delay(500);
  digitalWrite(redPin, LOW);
  digitalWrite(greenPin, LOW);
  digitalWrite(bluePin, LOW);
  delay(1000);
}