# init(group:name:repeatMode:fillMode:trimStart:trimEnd:trimDuration:offset:delay:speed:) Creates a collection of animations that play simultaneously. ``` init(group: [any AnimationDefinition], name: String = "", repeatMode: AnimationRepeatMode = .none, fillMode: AnimationFillMode = [], trimStart: TimeInterval? = nil, trimEnd: TimeInterval? = nil, trimDuration: TimeInterval? = nil, offset: TimeInterval = 0, delay: TimeInterval = 0, speed: Float = 1.0) ``` ## Parameters `group` A collection of animations to run. `name` A textual name for the group. `repeatMode` An option that determines how the animations repeat. `fillMode` The playback behavior outside of the normal duration. `trimStart` The time, in seconds, at which the animations play. `trimEnd` The time, in seconds, at which the animations stop. `trimDuration` An optional duration that overrides the calculated duration. `offset` The time, in seconds, at which the animation begins within the duration. `delay` An amount of time that lapses before the animation plays. `speed` A factor that increases or decreases the animation’s rate of playback. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)