function register() {
    let username = document.querySelector("#username").value;
    let email = document.querySelector("#email").value;
    let password = document.querySelector("#password").value;

    let result = document.querySelector("#result");
    let regex = /(.+)@(.+).(com|bg)/gm;
      if(username !== "" && password !== "") {
        if(email.match(regex)) {

          let h1 = document.createElement("h1");
          let paragraph1 = document.createElement("p");
          let paragraph2 = document.createElement("p");
          let paragraph3 = document.createElement("p");
          h1.textContent = "Successful Registration!";
          paragraph1.textContent = "Username: " + username;
          paragraph2.textContent = "Email: " + email;
          paragraph3.textContent = "Password: ";
            for(let i = 0 ; i < password.length; i++) {
              paragraph3.textContent = paragraph3.textContent + "*";
            }

          result.append(h1,paragraph1, paragraph2, paragraph3);

          setInterval(function () {
            result.remove();
            window.location.reload();
          }, 5000);

          document.querySelector("#username").value = "";
          document.querySelector("#email").value = "";
          document.querySelector("#password").value = "";
        }
      }
 }