# Sandbox.ParticleEffect.SequenceFitToLifetime

```csharp
bool SequenceFitToLifetime { get; set; }
```

Scale the sequence speed by the particle's lifetime, so at a [Sandbox.ParticleEffect.SequenceSpeed](/api/Sandbox.ParticleEffect/SequenceSpeed) of 1
a non-looping sequence finishes exactly as the particle dies, however long it lives.

Declared in [Sandbox.ParticleEffect](/api/Sandbox.ParticleEffect).
Assembly: `Sandbox.Engine`.