most pins called GPIO
make a melody by press force

Servo Motor
#include "Servo.h"
Servo servoMotor ; 
int servoPin = 9;
long lastMoveTime = 0;
void setup() {
  Serial.begin(9600);
  servoMotor.attach(servoPin);
}
void loop() {
  int analogValue = analogRead(A0);
  Serial.println(analogValue);
  int servoAngle = map(analogValue,0,800,0,179);
  if (millis()- lastMoveTime > 20 )
  {
    servoMotor.write (servoAngle);
    lastMoveTime = millis();
  }
}