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# init(_:duration:startVelocity:endVelocity:)

Creates a new keyframe using the given value and timestamp.

```
init(_ to: Value, duration: TimeInterval, startVelocity: Value? = nil, endVelocity: Value? = nil)
```

## Parameters

`to`

The value of the keyframe.

`duration`

The duration of the segment defined by this keyframe.

`startVelocity`

The velocity of the value at the beginning of the
segment, or `nil` to automatically compute the velocity to maintain
smooth motion.

`endVelocity`

The velocity of the value at the end of the segment,
or `nil` to automatically compute the velocity to maintain smooth
motion.

---

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