#define pin 23
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(21, OUTPUT);
  pinMode(22, OUTPUT);
  pinMode(19, OUTPUT);
  pinMode(18, OUTPUT);
}
void loop() {
 int val = analogRead(pin);
 Serial.println(val);
 delay(100);
 if(val<=10){
 digitalWrite(22, HIGH);
  delay(1000); 
   digitalWrite(22, LOW);
  delay(1000); 
 }
 else if(10<val && val<=20){
  digitalWrite(21, HIGH);
  digitalWrite(22, HIGH);
  delay(1000); 
   digitalWrite(21, LOW);
    digitalWrite(22, LOW);
  delay(1000); 
 }
 else if(20<val && val<=30){
 digitalWrite(21, HIGH);
  digitalWrite(22, HIGH);
  digitalWrite(19, HIGH);
  delay(1000); 
   digitalWrite(21, LOW);
    digitalWrite(22, LOW);
    digitalWrite(19, LOW);
  delay(1000); 
 }
 else{
 digitalWrite(21, HIGH);
  digitalWrite(22, HIGH);
  digitalWrite(19, HIGH); 
  digitalWrite(18, HIGH);
  delay(1000); 
   digitalWrite(21, LOW);
    digitalWrite(22, LOW);
    digitalWrite(19, LOW);
    digitalWrite(18, LOW);
  delay(1000); 
 }
}