int led1 = 22;
int led2 = 18;
int led3 = 5;

void setup() {
  Serial.begin(115200);
 pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
   pinMode(led3, OUTPUT);
 }


void loop() {
 int randomLed = random(0, 3);

  // Turn off all LEDs initially
  digitalWrite(led1, LOW);
  digitalWrite(led2, LOW);
  digitalWrite(led3, LOW);

  // Turn on the randomly selected LED
  if (randomLed == 0) {
    digitalWrite(led1, HIGH);
    delay(1000);
  } else if (randomLed == 1) {
    digitalWrite(led2, HIGH);
     delay(1000);
  } else if (randomLed == 2) {
    digitalWrite(led3, HIGH);
     delay(1000);
  }
}