# Compose sequences [Back to Use gameplay actions](https://rustic-game-engine.pages.dev/markdown/guides/gameplay-actions.md). `Sequence.new().call(fn)` queues a callback between steps; `.parallel({builder1, builder2})` starts their sequences together and waits for the longest. `Timeline` provides the same builder in every language. Do not replay a builder containing callbacks; construct a new builder so it has new callback tokens. `.animation(object, clipName, options?)` inserts clip playback as a sequence step.