// These constants won't change:
const int Target1DetectorPin = A1;   // pin that the sensor for the first target is attached to
const int Target2DetectorPin = A2;   // pin that the sensor for the second target is attached to
const int Target3DetectorPin = A3;   // pin that the sensor for the third target is attached to
const int Target1IndicatorPin = 2; // pin that the indicator for the first target is attached to
const int Target2IndicatorPin = 3; // pin that the indicator for the second target is attached to
const int Target3IndicatorPin = 4; // pin that the indicator for the third target is attached to
const int BuzzerPin = 5; //pin that the buzzer is attached to

const int HitThreshold = 200;  // an arbitrary threshold level that's in the range of the analog input

bool Target1Hit = false;
bool Target2Hit= false;
bool Target3Hit= false;

int ScoreCounter= 0;

#include <TM1637.h>

const int CLK = 11;
const int DIO = 12;

TM1637 tm(CLK, DIO);


void setup() {
// initialize serial communications:

pinMode(Target1IndicatorPin, OUTPUT);
pinMode(Target2IndicatorPin, OUTPUT);
pinMode(Target3IndicatorPin, OUTPUT);
pinMode(BuzzerPin, OUTPUT);

Target1Hit = false;
Target2Hit= false;
Target3Hit= false;

  tm.init();
  tm.set(BRIGHT_TYPICAL);

  tm.display(0, 0);
  tm.display(1, 0);
  tm.display(2, 0);
  tm.display(3, 0);

  tm.display(3,3);
  delay(1000);
  tm.display(3,2);
  delay(1000);
  tm.display(3,1);
  delay(1000);
  tm.display(3,0);
  tone(BuzzerPin, 1000);
  delay(500);
  noTone(BuzzerPin);


  tm.display(0, 1);
  tm.display(1, 0);
  tm.display(2, 0);
  tm.display(3, 0);

Serial.begin(9600);



}

void loop() {

//Start the sequence by turning on all of the lights. 
if (Target1Hit==false and Target2Hit==false and Target3Hit==false){
    digitalWrite(Target1IndicatorPin,HIGH);
    digitalWrite(Target2IndicatorPin,HIGH);
    digitalWrite(Target3IndicatorPin,HIGH);
  ScoreCounter=9999;
  
}


  // read the values from the detectors:
  int Target1Value = analogRead(Target1DetectorPin);
  int Target2Value = analogRead(Target2DetectorPin);
  int Target3Value = analogRead(Target3DetectorPin);

  // if the analog value is high enough, turn on the LED:
  if (Target1Value > HitThreshold) {
    Target1Hit=true;
    digitalWrite(Target1IndicatorPin,LOW);
 
   
  } else {
    
  }
 delay(10);  // delay in between reads for stability

  if (Target2Value > HitThreshold) {
      Target2Hit=true;
      digitalWrite(Target2IndicatorPin,LOW);

      
  } else {
    
  }
 delay(10);  // delay in between reads for stability


   if (Target3Value > HitThreshold) {
      Target3Hit=true;
  digitalWrite(Target1IndicatorPin,LOW);

    
  } else {
    
  }
 delay(10);  // delay in between reads for stability



if (Target1Hit==true and Target2Hit==true and Target3Hit==true){ //If all of the targets have been hit
   
    Serial.println(ScoreCounter);

  tm.display(0, (ScoreCounter / 1000) % 10);
  tm.display(1, (ScoreCounter / 100) % 10);
  tm.display(2, (ScoreCounter / 10) % 10);
  tm.display(3, (ScoreCounter % 10));
   
    //flash all of the lights 3 times    
    digitalWrite(Target1IndicatorPin,HIGH);
    digitalWrite(Target2IndicatorPin,HIGH);
    digitalWrite(Target3IndicatorPin,HIGH);
    tone(BuzzerPin, 200);
    delay(1000);
    digitalWrite(Target1IndicatorPin,LOW);
    digitalWrite(Target2IndicatorPin,LOW);
    digitalWrite(Target3IndicatorPin,LOW);
    noTone(BuzzerPin);
    delay(1000);
    digitalWrite(Target1IndicatorPin,HIGH);
    digitalWrite(Target2IndicatorPin,HIGH);
    digitalWrite(Target3IndicatorPin,HIGH);
    tone(BuzzerPin, 100);
    delay(1000);
    digitalWrite(Target1IndicatorPin,LOW);
    digitalWrite(Target2IndicatorPin,LOW);
    digitalWrite(Target3IndicatorPin,LOW);
    noTone(BuzzerPin);
    delay(1000);
    digitalWrite(Target1IndicatorPin,HIGH);
    digitalWrite(Target2IndicatorPin,HIGH);
    digitalWrite(Target3IndicatorPin,HIGH);
    tone(BuzzerPin, 100);
    delay(1000);
    digitalWrite(Target1IndicatorPin,LOW);
    digitalWrite(Target2IndicatorPin,LOW);
    digitalWrite(Target3IndicatorPin,LOW);
    noTone(BuzzerPin);
    delay(1000);

   

    //Then reset the sequence
    Target1Hit = false;
    Target2Hit= false;
    Target3Hit= false;
}

ScoreCounter=ScoreCounter-1;

  tm.display(0, (ScoreCounter / 1000) % 10);
  tm.display(1, (ScoreCounter / 100) % 10);
  tm.display(2, (ScoreCounter / 10) % 10);
  tm.display(3, (ScoreCounter % 10));

}