I used the animation for symbols on polylines according to this answer that was very useful: Animate symbol on multiple geodesic polylines
What i would like is to have s
id is an index into your array of polylines. To access the polyline you need to use polylines[id] (i.e polylines[id].setOptions.
You probably also want to stop the timer, for that you need to keep a reference to the value returned by setInterval.
working example
function stopCircle(id) {
clearInterval(polylines[id].handle);
polylines[id].polyline.setOptions({
icons: null});
};
Where the polylines array now contains:
polylines[i] = new Object();
polylines[i].polyline = polyline;
polylines[i].handle = animateCircle(i);