I want to add a timeline animation to an accordion open click and am relatively happy this Pen works fine.  However I can't help but feel how I determine the accordion is opening or closing is hacky.  Also I feel I should using this: var accordion_tl = gsap.timeline({paused:true});   And then this where my current timeline is: gsap.timeline().add(accordion_tl.play());   But anything I try doesn't work as I want.  The current code does exactly what I want but curious to kn