const int button = 2;
const int led = 5;
int buttonState = 0;
int brightness = 0;
int fadeAmount = 5;
int ms = 0;

void setup() {
  Serial.begin(9600);
  pinMode(2, INPUT);
  pinMode(5, OUTPUT);
  pinMode(A0, INPUT);
}

void loop() {
  detect();
  digitalWrite(led, LOW);

  if (buttonState == HIGH) {
      digitalWrite(led, HIGH);
      delay(ms);
      digitalWrite(led, LOW);
      delay(ms);
      digitalWrite(led, HIGH);
      delay(ms);
      digitalWrite(led, LOW);
      delay(ms);

    for (int i = 0; i <= 255; i += fadeAmount) {
      analogWrite(led, i);
      delay(10);
    }

    for (int i = 255; i >= 0; i -= fadeAmount) {
      analogWrite(led, i);
      delay(10);
    }
    //Serial.println(buttonState);
  }
}

void detect() {
  buttonState = digitalRead(button);
  ms = analogRead(A0);
  if (int(ms) >= 1000) {
    fadeAmount = 1;
  } else {
    if (int(ms) >= 800) {
      fadeAmount = 3;
    } else {
      if (int(ms) >= 600) {
        fadeAmount = 5;
      } else {
        if (int(ms) >= 400) {
          fadeAmount = 7;
        } else {
          if (int(ms) >= 200) {
            fadeAmount = 9;
          } else {
            if (int(ms) >= 11) {
              fadeAmount = 11;
            } else {
              if (int(ms) == 0 || int(ms) == 10) {
                ms = 10;
                fadeAmount = 13;
              }
            }
          }
        }
      }
    }
  }
  Serial.println(String(ms) + " " + String(fadeAmount));
}