boolean butt_flag = 0;
boolean butt;
boolean led_flag = 0;
unsigned long last_press;
byte LED=4;

void setup() {
  pinMode(3, INPUT_PULLUP);
  Serial.begin(9600);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  digitalWrite(4, 0);
  digitalWrite(5, 0);


}
void loop() {
  butt = !digitalRead(3); 

  if (butt == 1 && butt_flag == 0 &&  (millis() - last_press > 100)) {

    butt_flag = 1;
    Serial.println("Button pressed");
    digitalWrite(LED, 1);
    if (LED<5)  LED++; 
    last_press=millis();
  }
    if (butt == 0 && butt_flag == 1 &&  (millis() - last_press > 100)) {
      last_press=millis();
    butt_flag = 0;
    Serial.println("Button released");
  }
}