/**
 * main function
 */
var main = function () {
	var txt = ["Hello - World", "dog - cat", "foo - bah"]; // the text to add
	app.beginUndoGroup("add source text"); // open a undo group
	var curComp = app.project.activeItem; // get the current comp
	// check if the curent active item is a comp
	if (!curComp || !(curComp instanceof CompItem)) {
		alert("noComp");
		return;
		// end if no comp is active
	}
	var txtLayer = curComp.layers.addText("titles"); // add a text layer
	var counter = 0; // the time to add a keyframe to (in seconds)
	// loop the text
	for (var i = 0; i < txt.length; i++) {
		var curFrame = counter / curComp.frameRate; // calc time for each frame
		$.writeln(curFrame);
		// add a keyframe with the text as value every frame
		txtLayer.text.sourceText.setValueAtTime(curFrame, txt[i]);
		counter++; // increase the time by one
	}
	app.endUndoGroup();
};
main();