//**************************************************************************************
//                         Prova timer con istruzione millis                           *   
//**************************************************************************************
#define led 4
unsigned long temp = 0 ;
bool statoled = false ;
void setup() {
  pinMode (led, OUTPUT);
}

void loop() {
  if (millis() - temp >= 200) 
  { 
    if (statoled == false ) {
      statoled = true ;
    }
        else {
          statoled = false ;
        }
            digitalWrite(led, statoled);
                temp = millis() ;
  }

}