Script for border in %

Hello,

I want to create a script to add a white border with my website as signature to an entire batch of images with different sizes.

I've researched here and I found a script but when I've tried to customize to my needs returns me error on the 7 line.

As i never used a script nor know how to code, could anyone assist me with this issue please?

I also would like the text to be centralized in "height" and "width" on the bottom white bar.

I've already sweated a lot to customize this simple text to what I would like to achieve.

Thank you very much!

if(documents.length) app.activeDocument.suspendHistory('Add Border', 'main()');  
function main(){ 
var startRulerUnits = preferences.rulerUnits; 
app.preferences.rulerUnits = Units.PIXELS; 
var doc = activeDocument; 
var fivePercent = (doc.height/100) * 20; 
var OffsetX = twentyPercent; 
var OffsetY = twentyPercent/4; 
var White = new SolidColor(); 
White.rgb.hexValue = 'ffffff'; 
var White = new SolidColor(); 
White.rgb.hexValue = 'ffffff'; 
app.backgroundColor=White; 
doc.flatten(); 
app.activeDocument.resizeCanvas((doc.width + (twentyPercent*2)), (doc.height + (twentyPercent*2)), AnchorPosition.MIDDLECENTER); 
var newTextLayer = activeDocument.artLayers.add();  
newTextLayer.kind = LayerKind.TEXT;  
newTextLayer.textItem.kind = TextType.POINTTEXT 
newTextLayer.textItem.color = White;  
newTextLayer.textItem.font = "Source Sans Pro Regular"; 
newTextLayer.textItem.size = 18;  
newTextLayer.textItem.contents = "www.alessandro-vecchi.com";  
var LB = doc.activeLayer.bounds;  
var LHeight = Math.abs(LB[3].value) - Math.abs(LB[1].value); 
var percentage = ((twentyPercent/LHeight)*50); 
doc.activeLayer.resize(percentage,percentage,AnchorPosition.MIDDLECENTER); 
LB = doc.activeLayer.bounds;  
var X = (activeDocument.width - twentyPercent) - LB[2].value; 
var Y = (activeDocument.height - OffsetY) - LB[3]; 
activeDocument.activeLayer.translate(X,Y); 
doc.flatten(); 
preferences.rulerUnits = startRulerUnits; 
}