You're doing nothing wrong, this is just something really hard to wrap your head around and will require some trickery to get it to work.    I've tweaked your pen with the new code and put the ScrollTrigger logic on the timeline, not on the tween. If you have a timeline ScrollTrigger can only control the timeline not individual tweens.   I've made it so that the stroke of the letter M zooms in on the middle of the screen, until all other strokes are off screen. Then I've crea