var color = prompt("Color Threshold - ", "20");
var area = prompt("Minimum Area - ", "2");
var curve = prompt("Curve Fit - ", "Normal");
var corner = prompt("Corner Threshold - ", "Normal"); 
for (var i = 0; i < fl.getDocumentDOM().getTimeline().layers[0].frames.length; i++) {
	fl.getDocumentDOM().getTimeline().currentFrame = i;
	fl.getDocumentDOM().selectAll();
	fl.getDocumentDOM().traceBitmap(eval(color), eval(area), curve, corner);
	fl.getDocumentDOM().selectNone();
}
alert("traceBitmap completed");