boolin

const int LedPin = 6;
const int ButtonPin = 12;
int counter = 0;
bool ReadVal = 0;
bool LastReadVal = 0;
void setup()

{
  pinMode (LedPin, OUTPUT);
  pinMode (ButtonPin, INPUT) ;
  Serial.begin(9600) ;
}
boolean debounce(boolean last)
    {
    boolean current = digitalRead(ButtonPin);
    if (last != current)
    {
      delay(5);
      current = digitalRead(ButtonPin);
    }
    return current;
    }

void loop()
{
  ReadVal = digitalRead(ButtonPin) ;
  Serial.println(ReadVal) ;
  if (LastReadVal == LOW && ReadVal == HIGH && counter == 0)
  {
    for (int i = 0; i < 200; i++)
    {
      analogWrite(LedPin, i);
      delay(20);
      ReadVal = digitalRead(ButtonPin);
      if (ReadVal == 1)
      {
        i = 200;
      }
    }
    counter = 1;
  }
  else if (ReadVal == 1 && counter == 1)
  {
    for (int i = 200; i >= 0; i--)
    {
      analogWrite (LedPin, i);
      delay(20);
    }

    counter = 0;
  }
  LastReadVal=ReadVal;

}