int ledPin1 = 23;
int ledPin2 = 22;
int ledPin3 = 21;
int ledPin4 = 19;
int ledPin5 = 18;
int ledPin6 = 5;
int ledPin7 = 17;
int ledPin8 = 16;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(ledPin1, OUTPUT);
   pinMode(ledPin2, OUTPUT);
    pinMode(ledPin3, OUTPUT);
     pinMode(ledPin4, OUTPUT);
      pinMode(ledPin5, OUTPUT);
       pinMode(ledPin6, OUTPUT);
        pinMode(ledPin7, OUTPUT);
         pinMode(ledPin8, OUTPUT);

}
void loop() {
  digitalWrite(ledPin1, HIGH);
  digitalWrite(ledPin2, HIGH);
  digitalWrite(ledPin3, HIGH);
  digitalWrite(ledPin4, HIGH);
  digitalWrite(ledPin5, HIGH);
  digitalWrite(ledPin6, HIGH);
  digitalWrite(ledPin7, HIGH);
  digitalWrite(ledPin8, HIGH);
  // put your main code here, to run repeatedly:
  delay(500); // this speeds up the simulation

  digitalWrite(ledPin1, LOW);
  digitalWrite(ledPin2, LOW);
  digitalWrite(ledPin3, LOW);
  digitalWrite(ledPin4, LOW);
  digitalWrite(ledPin5, LOW);
  digitalWrite(ledPin6, LOW);
  digitalWrite(ledPin7, LOW);
  digitalWrite(ledPin8, LOW);
  delay(500);
}