How can I code part of Unity game in Lua or MoonSharp?

Question

I am trying to create an interface that users can code at runtime Unity. It is tough to find resource about it.

I added MoonSharp as a code editor to Unity Input Field. Here is my basic UI

Now the question is that how can the user create a GameObject (eg Box) using a Prefab and set its coordinates? (using MoonSharp)

First Scripts:

using UnityEngine;
using TMPro;
using UnityEngine.UI;

public class MainGame : MonoBehaviour
{
    MyScript testScript;

    public TMP_InputField tmpInput;
    public Toggle togInput1;
    public Toggle togInput2;
    public Toggle togOutput1;
    public Toggle togOutput2;

    private void Start()
    {
        string tmpString = @"
        function Update()
            if Input1 then
                Output1 = true
            else
                Output1 = false;
            end

            if Input2 then
                Output2 = true
            else
                Output2 = false;
            end
        end
        ";

        testScript = tmpInput.GetComponentInChildren<MyScript>();
        testScript.InitScript(tmpString);
        tmpInput.text = testScript.MyString;

    }

    private void Update()
    {
        //testScript.RunScript();
    }

    public void UpdateScript()
    {
        string tmpString = tmpInput.text;
        testScript.InitScript(tmpString);
        testScript.Input1 = togInput1.isOn;
        testScript.Input2 = togInput2.isOn;
        testScript.RunScript();

        togOutput1.isOn = testScript.Output1;
        togOutput2.isOn = testScript.Output2;

    }
}

Second Script:

using System.IO;
using UnityEngine;
using MoonSharp.Interpreter;

public class MyScript : MonoBehaviour
{
    public bool Input1;
    public bool Input2;
    public bool Output1;
    public bool Output2;

    public string MyString;

    Script script;

    public void InitScript(string ScriptText)
    {
        script = new Script();
        MyString = ScriptText;
        script.DoString(MyString);
    }

    public void RunScript()
    {
        script.Globals["Input1"] = Input1;
        script.Globals["Input2"] = Input2;
        script.Globals["Output1"] = Output1;
        script.Globals["Output2"] = Output2;

        DynValue dynValue = script.Call(script.Globals["Update"]);

        Output1 = script.Globals.Get("Output1").CastToBool();
        Output2 = script.Globals.Get("Output2").CastToBool();
    }

    //public void InitScriptFromFile(string FileName)
    //{
    //    script = new Script();
    //    StreamReader streamReader = new StreamReader(FileName);
    //    string tmpString = streamReader.ReadToEnd();
    //    streamReader.Close();
    //    script.DoString(tmpString);
    //}
}