how script create text frame ?

Here an example where also a new document is added:

var doc = app.documents.add();
var textFrame = doc.textFrames.add();
textFrame.properties =
{
    geometricBounds : [ 0,0,100,100 ],
    strokeWidth : 0,
    fillColor : "None",
    contents : "Hello World!"
};

Another one that is working with the active document:

var doc = app.activeDocument;
var textFrame = doc.pages[0].textFrames.add();
textFrame.properties =
{
    geometricBounds : [ 0,0,100,100 ],
    strokeWidth : 0,
    fillColor : "None",
    contents : "Hello World!"
};

Yet another example that is working with an open document with the index 0 :

var doc = app.documents[0];
var textFrame = doc.spreads[0].pages[0].textFrames.add();
textFrame.properties =
{
    geometricBounds : [ 0,0,100,100 ],
    strokeWidth : 0,
    fillColor : "None",
    contents : "Hello World!"
};

Note, that you could address the document, a spread or a page for adding the text frame.

In case of document, the first spread is addressed automatically.

Properties could be also added when using method add() :

var doc = app.documents[0];
var textFrame = doc.spreads[0].textFrames.add
(
    {
        geometricBounds : [ 0,0,100,100 ],
        strokeWidth : 0,
        fillColor : "None",
        contents : "Hello World!"
        
        // Add other property/value pairs if you like.
        // To see what's available see DOM documentation.
        // e.g. here: http://www.jongware.com/idjshelp.html
        // or: https://www.indesignjs.de/extendscriptAPI/indesign13/#about.html
    }
);

Regards,
Uwe