---
title: particleAlphaSequence
framework: spritekit
role: symbol
role_heading: Instance Property
path: spritekit/skemitternode/particlealphasequence
---

# particleAlphaSequence

The sequence used to specify the alpha value of a particle over its lifetime.

## Declaration

```swift
var particleAlphaSequence: SKKeyframeSequence? { get set }
```

## Mentioned in

Animating Particle Properties Across Disparate Values Using Keyframe Sequence to effect Custom Interpolation

## Discussion

Discussion The default value is nil. If a non-nil value is specified, then the particleAlpha, particleAlphaRange, and particleAlphaSpeed properties are ignored. Instead, the sequence is used to specify the alpha value.

## See Also

### Blending Particles with the Framebuffer

- [particleBlendMode](spritekit/skemitternode/particleblendmode.md)
- [particleAlpha](spritekit/skemitternode/particlealpha.md)
- [particleAlphaRange](spritekit/skemitternode/particlealpharange.md)
- [particleAlphaSpeed](spritekit/skemitternode/particlealphaspeed.md)