// Creates a line renderer at the origin with 2 colors.
    function Start() {
        var lineRenderer : LineRenderer;
        lineRenderer = gameObject.AddComponent(LineRenderer);
        lineRenderer.useWorldSpace = false;
        lineRenderer.material = new Material (Shader.Find("Particles/Additive"));
        lineRenderer.SetColors(Color.red, Color.yellow);
    }

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
    void Start() {
        LineRenderer lineRenderer;
        lineRenderer = gameObject.AddComponent<LineRenderer>();
        lineRenderer.useWorldSpace = false;
        lineRenderer.material = new Material(Shader.Find("Particles/Additive"));
        lineRenderer.SetColors(Color.red, Color.yellow);
    }
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

    def Start():
        lineRenderer as LineRenderer
        lineRenderer = gameObject.AddComponent[of LineRenderer]()
        lineRenderer.useWorldSpace = false
        lineRenderer.material = Material(Shader.Find('Particles/Additive'))
        lineRenderer.SetColors(Color.red, Color.yellow)