int langs[] = {2,4,5,7,8,12};
int leds[] = {6,9,10,11};
int triggerPin = 13;
int tracePin = 3;

bool langStatus[] = {0,0,0,0};
int oldLang = 0;
int currentLang = 0;

bool oldTrigger = 0;
bool trigger = 0;

int traceStatus = 0;

void setup() {

  Serial.begin(9600);

  for(int i=0; i<6; i++) {
    pinMode(langs[i], INPUT);
    pinMode(leds[i], OUTPUT);
  }
  pinMode(triggerPin, INPUT);
  pinMode(tracePin, OUTPUT);

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

void loop() {

  trigger = digitalRead(triggerPin);

  if(oldTrigger != trigger) {
    oldTrigger = trigger;

    if(trigger == HIGH) {
      checkLang();
      Serial.print("speech");
      Serial.print("\t");
      Serial.println(currentLang);

      for(int i=traceStatus; i>=0; i--) {
        analogWrite(tracePin, i);
        delay(5);
      }
      for(int i=0; i<1000; i++) {
        analogWrite(leds[0], constrain(i,0,255));
        analogWrite(leds[1], constrain(i-100, 0, 255));
        analogWrite(leds[2], constrain(i-300, 0, 255));
        analogWrite(leds[3], constrain(i-600, 0, 255));
        delay(5);
      }
    } else {
      for(int i=255; i>=0; i--) {
        checkLang();
        for(int x=0; x<4; x++) {
          analogWrite(leds[x], i);
        }
        delay(10);
      }

      while(oldTrigger == trigger) {
        trigger = digitalRead(triggerPin);
        for(traceStatus=0; traceStatus<255; traceStatus++) {
          analogWrite(tracePin, traceStatus);
          delay(10);
        }
        trigger = digitalRead(triggerPin);
        for(traceStatus=255; traceStatus>0; traceStatus--) {
          analogWrite(tracePin, traceStatus);
          delay(10);
        }
        trigger = digitalRead(triggerPin);
      }
    }
  }
}


void checkLang() {

  currentLang = 0;
  for(int i=0; i<6; i++) {
    langStatus[i] = digitalRead(langs[i]);
    //Serial.print(langStatus[i]);
    //Serial.print("\t");
    if(langStatus[i] == LOW) {
      currentLang = i+1;
    }
  }

  if(oldLang != currentLang) {
    oldLang = currentLang;
    //Serial.println(currentLang);
  }
}