Tasks 19 and 20

Task 19:

int LEDPin = 13;
int delvar; //This variable changes the speed of the LEDPin2 LED.
void setup()
{
  pinMode(LEDPin, OUTPUT);     
}

void loop()
{
  for (int count = 1; count < 11; count++)
  {
    delvar = (count * 100);
    digitalWrite(LEDPin, HIGH);  
    delay(delvar);                 
    digitalWrite(LEDPin, LOW);
    delay(delvar);
  } 
}


Task 20:

int LEDPin = 13;
int delvar; //This variable changes the speed of the LEDPin2 LED.
void setup()
{
  pinMode(LEDPin, OUTPUT);     
}

void loop()
{
  for (int count = 1; count < 101; count++)
  {
    delvar = (count * 10);
    digitalWrite(LEDPin, HIGH);  
    delay(delvar);                 
    digitalWrite(LEDPin, LOW);
    delay(delvar);
  } 
  for (int count = 100; count > 0; count--)
  {
    delvar = (count * 10);
    digitalWrite(LEDPin, HIGH);  
    delay(delvar);                 
    digitalWrite(LEDPin, LOW);
    delay(delvar);
  }
}