// creating a document
var doc = app.documents.add();
// adding a new layer
var layer = doc.layers.add();

// variable declarations
var i, ray, displacement, dx, dy;

// creating 20 path items in a loop and setting their parameters
for (i = 0; i < 20; i++) {
    // adding a path item and saving it to the "ray" variable
    ray = layer.pathItems.add();
    // defining path points
    ray.setEntirePath([ [0, 0], [0, 10]]);

    // generating a random angle for rotation
    // note: rotation in Illustrator is counter-clockwise
    ray.rotation = Math.round(Math.random() * 360);
    // applying rotation to the path, using its bottom as the origin point
    ray.rotate(ray.rotation, true, true, true, true, Transformation.BOTTOM);

    // moving the path away from the center of the document by "displacement" amount
    displacement = 10 + Math.random() * 10;
    // calculating x and y coordinates from "displacement"
    // (which is basically a hypotenuse)
    dx =   displacement * Math.sin( (180 + ray.rotation) * Math.PI / 180 );
    dy = - displacement * Math.cos( (180 + ray.rotation) * Math.PI / 180 );
    // translating the path
    ray.translate(dx, dy);
}