int inputPin = 4; // Input sensor pin number

void setup() {
  pinMode(inputPin, INPUT); // Set pin mode (INPUT / OUTPUT)
  Serial.begin(9600); // sets the data rate in bits per second (baud) for serial data tranmission
}

void loop() {
  int inputValue = analogRead(inputPin); // read inputPin analog signal (0-1023)

  Serial.println(inputValue); // output to serial monitor or plotter

  delay(100); // delay 0.5 second
}