Script making help

Hey there I'm trying to create a script which can look up for specific properties in any active comp and apply an expression of control to each, depending in some variables, like their color, I have a null created with the expressions control effects , I've created the script but when I run it I don't get any error, nothing happens, am I doing something wrong? 

function applyExpressionsToSelectedLayers() {
// Get the currently active composition
var comp = app.project.activeItem;

// Check if a composition is active
if (comp !== null && comp instanceof CompItem) {
// Get the selected layers
var selectedLayers = comp.selectedLayers;

// Loop through all selected layers
for (var i = 0; i < selectedLayers.length; i++) {
var layer = selectedLayers[i];

// Check if the layer is a shape layer
if (layer instanceof ShapeLayer) {
// Loop through all groups in the shape layer
for (var j = 1; j <= layer.property("ADBE Root Vectors Group").numProperties; j++) {
var group = layer.property("ADBE Root Vectors Group").property(j);

// Check if the group has a stroke
if (group.property("ADBE Vector Graphic - Stroke").enabled) {
// Get the stroke color
var strokeColor = group.property("ADBE Vector Graphic - Stroke").property("ADBE Vector Stroke Color").value;

// Set stroke color expression
var highlightExpression = 'thisComp.layer("Main Stroke width - Color Ctrl").effect("Highlight")("Color")';
var baseColorExpression = 'thisComp.layer("Main Stroke width - Color Ctrl").effect("Base Color")("Color")';
group.property("ADBE Vector Graphic - Stroke").property("ADBE Vector Stroke Color").expression = 'if (Math.round(thisComp.layer("Main Stroke width - Color Ctrl").effect("Color Control")("Color")[0]) == ' + Math.round(strokeColor[0]) + ' && Math.round(thisComp.layer("Main Stroke width - Color Ctrl").effect("Color Control")("Color")[1]) == ' + Math.round(strokeColor[1]) + ' && Math.round(thisComp.layer("Main Stroke width - Color Ctrl").effect("Color Control")("Color")[2]) == ' + Math.round(strokeColor[2]) + ') {\n ' + highlightExpression + ';\n} else {\n ' + baseColorExpression + ';\n}';

// Set stroke width expression based on stroke color
var strokeWidthExpression = 'if (Math.round(thisComp.layer("Main Stroke width - Color Ctrl").effect("Color Control")("Color")[0]) == ' + Math.round(strokeColor[0]) + ' && Math.round(thisComp.layer("Main Stroke width - Color Ctrl").effect("Color Control")("Color")[1]) == ' + Math.round(strokeColor[1]) + ' && Math.round(thisComp.layer("Main Stroke width - Color Ctrl").effect("Color Control")("Color")[2]) == ' + Math.round(strokeColor[2]) + ') {\n thisComp.layer("Main Stroke width - Color Ctrl").effect("Highlight Width")("Slider");\n} else {\n thisComp.layer("Main Stroke width - Color Ctrl").effect("Base Width")("Slider");\n}';
group.property("ADBE Vector Graphic - Stroke").property("ADBE Vector Stroke Width").expression = strokeWidthExpression;
}
}
}
}
} else {
alert("Please select a composition first.");
}
}

// Create UI panel
var scriptPanel = new Window("palette", "Apply Expressions to Selected Layers", undefined);
var applyButton = scriptPanel.add("button", undefined, "Apply Expressions");
applyButton.onClick = applyExpressionsToSelectedLayers;
scriptPanel.show();