// C++ code
int ON = 0;
int START = 0;
int STOP = 0;
int TIME = 0;
int SEC = 0;
float SEC_LEFT = 0;
int TONE = 0;
float BEEP = 0.20;

#define bz1 3 

#define bt1 4
#define bt2 5
#define bt3 10

#define lEDG1 6  
#define lEDG2 7  
#define lEDG3 8  
#define lEDP1 9  
//-----------------------------------------------------------------------
void setup(){
  pinMode(lEDG1, OUTPUT);
  pinMode(bz1, OUTPUT);
  pinMode(lEDP1, OUTPUT);
  pinMode(bt2, INPUT);
  Serial.begin(9600);
  pinMode(lEDG3, OUTPUT);
  pinMode(lEDG3, OUTPUT);
  pinMode(bt3, INPUT);
  pinMode(bt1, INPUT);
  ON = 0;
  TIME = 1;
  SEC = 15;
  digitalWrite(lEDG1, HIGH);
}
//-----------------------------------------------------------------------
void loop(){
  TONE = 1;
  SEC_LEFT = SEC;
  while (ON == 1) {
    analogWrite(bz1, TONE);
    delay(300); // Wait for 300 millisecond(s)
    analogWrite(bz1, TONE);
    delay(500); // Wait for 500 millisecond(s)
    Serial.println(BEEP,2);
    while (BEEP > 0.15) {
      SEC_LEFT += -1;
      BEEP = (0.1 * (0.9 * (SEC_LEFT / SEC)));
      Serial.println(BEEP,2);
      analogWrite(bz1, TONE);
      digitalWrite(lEDP1, HIGH);
      delay(1000); // Wait for 1000 millisecond(s)
      analogWrite(bz1, 0);
      digitalWrite(lEDP1, LOW);
      ON = 0;
    }
  }
  if (digitalRead(bt2) == HIGH) {   // START OF CYCLE THROUGH TIME
    Serial.println("activate bt2" );
    if (TIME == 4) {
       Serial.println(TIME); 
      TIME = 1;
      SEC = 15;
      digitalWrite(lEDG1, HIGH);
      digitalWrite(lEDP1, LOW);
      digitalWrite(lEDG3, LOW);
    }
    if (TIME == 1) {
      SEC = 15;
      digitalWrite(lEDG1, HIGH);
      digitalWrite(lEDP1, LOW);
      digitalWrite(lEDG3, LOW);
    }
    if (TIME == 2) {
      SEC = 15;
      digitalWrite(lEDP1, HIGH);
      digitalWrite(lEDG1, LOW);
      digitalWrite(lEDG3, LOW);
    }
    if (TIME == 3) {
      SEC = 15;
      digitalWrite(lEDG3, HIGH);
      digitalWrite(lEDP1, LOW);
      digitalWrite(lEDG1, LOW);
    }
    // END OF CYCLE THROUGH TIME
    delay(500); // Wait for 500 millisecond(s)
    TIME += 1;
  }
  if (digitalRead(bt3) == HIGH) {   // START OF START BUTTON
    Serial.println("activate bt3");
    ON = 1;
    // END OF START BUTTON
    delay(500); // Wait for 500 millisecond(s)
  }
  if (digitalRead(bt1) == HIGH) {   // START OF STOP BUTTON
    Serial.println("activate bt1");
    ON = 0;
    digitalWrite(lEDP1, LOW);
    // END OF STOP BUTTON
    delay(500); // Wait for 500 millisecond(s)
  }
}

/*
int ON = 0;
int START = 0;
int STOP = 0;
int TIME = 0;
int SEC = 0;
int SEC_LEFT = 0;
int TONE = 0;
int BEEP = 0;

void setup(){
  pinMode(6, OUTPUT);
  pinMode(3, OUTPUT);
  pinMode(9, OUTPUT);
  pinMode(5, INPUT);
  Serial.begin(9600);
  pinMode(7, OUTPUT);
  pinMode(8, OUTPUT);
  pinMode(3, INPUT);
  pinMode(4, INPUT);
  ON = 0;
  TIME = 1;
  SEC = 15;
  digitalWrite(6, HIGH);
}

void loop(){
  TONE = 1;
  SEC_LEFT = SEC;
  while (ON == 1) {
    analogWrite(3, TONE);
    delay(300); // Wait for 300 millisecond(s)
    analogWrite(3, TONE);
    delay(500); // Wait for 500 millisecond(s)
    while (BEEP > 0.15) {
      SEC_LEFT += -1;
      BEEP = (0.1 * (0.9 * (SEC_LEFT / SEC)));
      analogWrite(3, TONE);
      digitalWrite(9, HIGH);
      delay(1000); // Wait for 1000 millisecond(s)
      analogWrite(3, 0);
      digitalWrite(9, LOW);
    }
  }
  // START OF CYCLE THROUGH TIME
  if (digitalRead(5) == HIGH) {
    Serial.println("activate");
    TIME += 1;
    if (TIME == 4) {
      TIME = 1;
      SEC = 15;
      digitalWrite(6, HIGH);
      digitalWrite(7, LOW);
      digitalWrite(8, LOW);
    }
    if (TIME == 1) {
      SEC = 15;
      digitalWrite(6, HIGH);
      digitalWrite(7, LOW);
      digitalWrite(8, LOW);
    }
    if (TIME == 2) {
      SEC = 15;
      digitalWrite(7, HIGH);
      digitalWrite(6, LOW);
      digitalWrite(8, LOW);
    }
    if (TIME == 3) {
      SEC = 15;
      digitalWrite(8, HIGH);
      digitalWrite(7, LOW);
      digitalWrite(6, LOW);
    }
    // END OF CYCLE THROUGH TIME
    delay(500); // Wait for 500 millisecond(s)
  }
  // START OF START BUTTON
  if (digitalRead(3) == HIGH) {
    Serial.println("activate");
    ON = 1;
    // END OF START BUTTON
    delay(500); // Wait for 500 millisecond(s)
  }
  // START OF STOP BUTTON
  if (digitalRead(4) == HIGH) {
    Serial.println("activate");
    ON = 0;
    digitalWrite(9, LOW);
    // END OF STOP BUTTON
    delay(500); // Wait for 500 millisecond(s)
  }
}
*/