Tween Desk

`+=1` does not mean one second after the last tween - it means one second after the TIMELINE'S END, which is a maximum over every child inserted so far, not a running total. Paste a GSAP timeline and this resolves every position to a time, names what each one was measured from and what a reader would have assumed instead, works out each tween's effective length once stagger and repeat are counted, and gives the real duration. Derived from GreenSock's official gsap-timeline and gsap-core skills (greensock/gsap-skills); credited in the app footer.

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