//preparation for count DOWN bar


unsigned long timeBegin = 0;
int delayTime = 10; //in sec


void setup() {
  // begin time 
  Serial.begin(9600);
  Serial.print("Begin ");
  delay(1000);
  timeBegin =  millis();
  Serial.println(timeBegin );
}

void loop() {
  
  //vime kolik sec je delay time
  unsigned long rozdil = 1000*delayTime ;

  //budeme odecitat konec od zacatku a tim mame zbuvajici cas / 1000 je pocet vterin???

  float procento = (float)rozdil/100;
  /*
  Serial.print( "Rozdil " );
  Serial.print( rozdil );
  Serial.print( ", procento " );
  Serial.print( procento );
  Serial.print( ", millis " );
  Serial.print( millis() );
  */

  //pokud je konec vetsi nez nyni
      //currentMillis - previousMillis >= interval
  //unsigned long currentMillis = millis();      
  if ( millis() - timeBegin <=  delayTime*1000  ){
    //tady pocitme procenta na zobrazeni 100% = 16 znaku
    //celkova hodnota
    //zname time end a zname begin
    //procento  se vzpocita z timeend - time begin
    //unsigned long celkemHodnota = timeBegin - millis();
    int zustatek = timeBegin+rozdil - millis();
    Serial.print( "Zustatek  " );
    Serial.print( zustatek );

    int procent = zustatek/procento;
    Serial.print( ", tj. procent  " );
    Serial.print( procent );

    Serial.print( ", PREVOD NA BAR " );
     Serial.print( procent*0.16, 0 ); //mame 16 dilu jedno procento je 0.16


    //float procento = (celkemHodnota-timeBegin) / 100; //procento z celku
    //unsigned long zbyvajiciHodnota = timeBegin - millis();
    


    //Serial.print( " 1 procento " );
    //Serial.print( procento  );

    //Serial.print( " pocet Procent zustatek " );
    //Serial.print( procento  );


    /**
      Serial.print( " 100%=" );
    Serial.print( celkemHodnota );
    Serial.print( " zbyva " );
    Serial.print( zbyvajiciHodnota );
    Serial.print( "  tj procent " );
    
    
    int procentOdpocet = zbyvajiciHodnota/procento ;
    Serial.print( procentOdpocet );
    Serial.print( "%  BAR: procento bar " );
    //ted to musime rozdelit na 16 dilku do kterych to musime nacpat
    
    
    float barProc = 16.0/100; 
    
    Serial.print( barProc );
    unsigned long dispBar = procentOdpocet *  barProc;
    
    Serial.print( dispBar );
    */

    Serial.println( " " );



  }else{
    Serial.println(  " RESET " );
    delay(2500);
    timeBegin =  millis();
    
  }
    
    //Serial.println( millis() );
  
  delay(500);
  // put your main code here, to run repeatedly:

}