//Question1

// void setup() {
//   pinMode(4, OUTPUT);
//   pinMode(7, OUTPUT);
//   pinMode(8, OUTPUT);
  
  
// }

// void loop() {
//   digitalWrite(4, HIGH);   
//   delay(300);              
//   digitalWrite(4, LOW);   
//   delay(300);   
//   digitalWrite(7, HIGH);  
//   delay(300);              
//   digitalWrite(7, LOW);    
//   delay(300);   
//   digitalWrite(8, HIGH);  
//   delay(300);              
//   digitalWrite(8, LOW);    
//   delay(300);              
// }



//Question2

void setup() {
  pinMode(7, OUTPUT);

}

void loop() {
 
 //Fade Up
 analogWrite(7, 0);
 delay(500);    

 analogWrite(7, 25);
 delay(500);      

 analogWrite(7, 50);
 delay(500);   

 analogWrite(7, 75);
 delay(500);  

 analogWrite(7, 100);
 delay(500);      

 analogWrite(7, 125);
 delay(500);   

 analogWrite(7, 150);
 delay(500);     

 analogWrite(7, 175);
 delay(500); 

 analogWrite(7, 200);
 delay(500);  

 //Fade Down
 analogWrite(7, 175);
 delay(500);   
  
 analogWrite(7, 150);
 delay(500);

 analogWrite(7, 125);
 delay(500);

 analogWrite(7, 100);
 delay(500); 

 analogWrite(7, 75);
 delay(500); 

 analogWrite(7, 25);
 delay(500);   
}