Reading an Arduino program?

Hey, I'm currently (still) trying to send data from my Arduino to a database in MySQL. However, nothing is coming through, and the Arduino keeps blinking TX (which stands for sending data, right?).

Here is the VSC program:

 var mysql = require('mysql'); var SerialPort = require("serialport"); var column_name = 'Wert' var table_name = 'Wertetabelle' const parsers = SerialPort.parsers; const parser = new parsers.Readline({    delimiter: '\r\n' }); var port = new SerialPort('COM4', {    baudRate: 9600,    dataBits: 8,    parity: 'none',    stopBits: 1,    flowControl: false }); port.pipe(parser); //Determine the connection to MySQL var con = mysql.createConnection({  host: "localhost",  user: "root",  password: "",  database: "werte_datenbank" }); //Connect with Database con.connect(function(err) {    // Build the connection    if (err) throw err;    console.log("Connected!"); }); parser.on('data', function(data){    console.log(data);    // Deklariert was genau wo gespeichert werden soll    var sql = "INSERT INTO `werte_tabelle` (`Wert`) VALUES ('" + data + "');"    // Speichert bei Änderungen die neuen Daten in der Datenbank    con.query(sql, function (err, result) {      if (err) throw err;      console.log("1 record inserted");    }); }); //DELETE FROM `werte_tabelle` WHERE 1 var sql = "DELETE FROM `werte_tabelle` WHERE 1" // Löscht die Datenbank con.query(sql, function (err, result) {    if (err) throw err;    console.log("Every Entry deleted");

});

Here is the program from the Arduino Editor:

 int pinPx = 3; int x = 1; const long intervall = 20000; bool zeitspanne = true; float zeit_now = millis(); void setup() {  Serial.begin(9600);  pinMode(pinPx, INPUT); } void loop() {  zeit_now = millis();  while (zeitspanne == true) {    if (digitalRead(pinPx) == true) {      Serial.write(x);    }    if (millis() > (zeit_now + intervall)) {      zeitspanne = false;    }  }  pinPx = pinPx + 1;  x = x + 1;  zeitspanne = true; }

Thank you!!