You can use this:
HYPE.documents['DocumentName'].startTimelineNamed('timelineName', ),HYPE.documents['DocumentName'].kDirectionForward);
Not tested, but it should work
You can use this:
HYPE.documents['DocumentName'].startTimelineNamed('timelineName', ),HYPE.documents['DocumentName'].kDirectionForward);
Not tested, but it should work