# trails

> Script interface for the TrailsModule of a Particle System.

## Definition

* **Type:** Property
* **Namespace:** [UnityEngine](/engine/6000.0/script-reference/unityengine.md)
* **Assembly:** UnityEngine.ParticleSystemModule

```csharp
public ParticleSystem.TrailModule trails { get; }
```

### Remarks

This module adds trails to your particles. Trails can either be left in the wake of particles as they move, or can connect each particle in the system together.

Particle System modules do not need to be reassigned back to the system; they are interfaces and not independent objects.

### Examples

```csharp
using UnityEngine;
using System.Collections;

[RequireComponent(typeof(ParticleSystem))]
public class ExampleClass : MonoBehaviour {

    void Start() {
        ParticleSystem ps = GetComponent<ParticleSystem>();
        var trails = ps.trails;
        trails.enabled = true;
        trails.ratio = 0.5f;
    }
}
```