int sw1 = 13;
int led1 = 26;
int led2 = 25;
int led3 = 33;
int led4 = 32;
int count =0;
void setup() {
  Serial.begin (9600);
  pinMode (sw1, INPUT_PULLUP);
  pinMode (led1, OUTPUT);
  pinMode (led2, OUTPUT);
  pinMode (led3, OUTPUT);
  pinMode (led4, OUTPUT);
}
void loop() {
  int value1 = digitalRead (sw1);
  if (value1 == 0) {
    delay(200);
    count ++;
    if (count > 4) {
      count = 0 ;
    }
    Serial.println ("count:" + String(count));
  }
  if (count == 0) {
    digitalWrite(led1, 0);
    digitalWrite(led2, 0);
    digitalWrite(led3, 0);
    digitalWrite(led4, 0);
  } else if (count == 1) {
  digitalWrite(led1, 1);
    digitalWrite(led2, 0);
    digitalWrite(led3, 0);
    digitalWrite(led4, 0);
  } else if (count == 2) {
  digitalWrite(led1, 1);
    digitalWrite(led2, 1);
    digitalWrite(led3, 0);
    digitalWrite(led4, 0);
  } else if (count == 3) {
  digitalWrite(led1, 1);
    digitalWrite(led2, 1);
    digitalWrite(led3, 1);
    digitalWrite(led4, 0);
    
  } else if (count == 4) {
  digitalWrite(led1, 1);
    digitalWrite(led2, 1);
    digitalWrite(led3, 1);
    digitalWrite(led4, 1);
  }
   
}