---
title: "init(group:name:repeatMode:fillMode:trimStart:trimEnd:trimDuration:offset:delay:speed:)"
framework: realitykit
role: symbol
role_heading: Initializer
path: "realitykit/animationgroup/init(group:name:repeatmode:fillmode:trimstart:trimend:trimduration:offset:delay:speed:)"
---

# init(group:name:repeatMode:fillMode:trimStart:trimEnd:trimDuration:offset:delay:speed:)

Creates a collection of animations that play simultaneously.

## Declaration

```swift
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.