const int analogPin = 4; // Analog input pin
const int LED1 = 18; // Digital output pin for LED1
const int LED2 = 19; // Digital output pin for LED2
const int LED3 = 21;

int val = 0; // Variable to store the raw analog value
int mappedVal = 0; // Variable to store the mapped value

void setup() {
  Serial.begin(9600); // Initialize serial communication at 9600 bps
  pinMode(LED1, OUTPUT); // Set LED1 pin as an output
  pinMode(LED2, OUTPUT); // Set LED2 pin as an output
  pinMode(LED3, OUTPUT);
}

void loop() {
  val = analogRead(analogPin); // Read the analog input
  mappedVal = map(val, 0, 4095, 0, 100); // Map the analog value to a range of 0 to 100

  if (mappedVal >= 70) { // If the mapped value is 50 or greater
    digitalWrite(LED1, HIGH); // Turn on LED1
    digitalWrite(LED2, LOW); // Turn off LED2
    digitalWrite(LED3, LOW);
  } else if (mappedVal >= 31) { // If the mapped value is less than 50
    digitalWrite(LED1, LOW); // Turn off LED1
    digitalWrite(LED2, HIGH); // Turn on LED2
    digitalWrite(LED3, LOW);
    } else if (mappedVal <= 30) { // If the mapped value is less than 50
    digitalWrite(LED1, LOW); // Turn off LED1
    digitalWrite(LED2, LOW); // Turn on LED2
    digitalWrite(LED3, HIGH);
  } else { // This else condition is redundant since all cases are covered above
    digitalWrite(LED1, LOW); // Turn off LED1
    digitalWrite(LED2, LOW); // Turn off LED2
    digitalWrite(LED3, LOW);
  }

  Serial.print("val = ");
  Serial.println(mappedVal); // Print the mapped value to the serial monitor
  delay(500); // Wait for 500 milliseconds
}