#define led_R 13
#define led_Y 12
#define led_G 11
#define potM A0
#define btn_r 7
#define btn_y 6
#define btn_g 5

//int reading = 0;

void setup() {
  pinMode(led_R, OUTPUT);
  pinMode(led_Y, OUTPUT);
  pinMode(led_G, OUTPUT);
  pinMode(btn_r, INPUT);
  pinMode(btn_y, INPUT);
  pinMode(btn_g, INPUT);
  Serial.begin(9600);
  Serial.setTimeout(10);
  Serial.println("Begin");
}

void loop() {

 // while (Serial.available() > 0){
 // int reading = Serial.read();
  int potmVal = analogRead(potM);
  int brightness = map(potmVal, 0, 1023, 0, 255);

  if(digitalRead (btn_g) == HIGH){
  digitalWrite(led_G, HIGH);
  analogWrite(led_G, brightness);
  Serial.print("green on: ");
 // Serial.println(reading);
  Serial.print("Brightness level: ");
  Serial.println(brightness);
  delay(100);
  }

  else if (digitalRead (btn_y) == HIGH){
  digitalWrite(led_Y, HIGH);
  analogWrite(led_Y, brightness);
  Serial.print("yellow on: ");
  // Serial.println(reading, DEC);
  Serial.print("Brightness level: ");
  Serial.println(brightness);
  delay(100);
}

  else if (digitalRead (btn_r) == HIGH){
  digitalWrite(led_R, HIGH);
  analogWrite(led_R, brightness);
  Serial.println("red on: ");
  //Serial.println(reading, DEC);
  Serial.print("Brightness level: ");
  Serial.println(brightness);
  delay(100);
  }

  else {
  digitalWrite(led_G, LOW);
  digitalWrite(led_R, LOW);
  digitalWrite(led_Y, LOW);

  Serial.println("all are off: ");
 // Serial.println(reading, DEC);
  Serial.print("Brightness level: ");
  Serial.println(brightness);
  delay(1000);
  }
}