What problem does it solve? Coordinating multiple animations with chained delays is fragile and hard to maintain. This Skill provides guidance for building GSAP timelines that sequence, overlap, and control tweens deterministically. ## Core Features & Use Cases - Timeline Creation & Defaults: Build timelines with gsap.timeline() and shared defaults for duration and easing across child tweens. - Position Parameter & Labels: Place tweens at absolute times, relative offsets, or named labels for readable sequencing. - Nesting & Playback Control: Nest child timelines into master timelines and control playback with play, reverse, seek, and progress methods. - Use Case: Choreograph a landing page intro where a logo fades in, a headline slides up 0.2s later, and a call-to-action button scales in at the same time as the headline. ## Quick Start Ask the AI to create a GSAP timeline that fades in a header, then slides in a subtitle 0.3 seconds later, with both tweens sharing a power2.out ease.