// Change spot angle randomly between 'minAngle' and 'maxAngle'
// each 'interval' seconds.

var interval : float = 0.3;
var minAngle : float = 10;
var maxAngle : float = 90;
private var timeLeft : float;

timeLeft = interval;
light.type = LightType.Spot;

function Update () {
    timeLeft -= Time.deltaTime;
    if (timeLeft < 0.0) {
        // time to change!
        timeLeft = interval;
        light.spotAngle = Random.Range( minAngle, maxAngle );
    }
}

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
    public float interval = 0.3F;
    public float minAngle = 10;
    public float maxAngle = 90;
    private float timeLeft;
    void Update() {
        timeLeft -= Time.deltaTime;
        if (timeLeft < 0.0F) {
            timeLeft = interval;
            light.spotAngle = Random.Range(minAngle, maxAngle);
        }
    }
    void Example() {
        timeLeft = interval;
        light.type = LightType.Spot;
    }
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

    public interval as single = 0.3F

    public minAngle as single = 10

    public maxAngle as single = 90

    private timeLeft as single

    def Update():
        timeLeft -= Time.deltaTime
        if timeLeft < 0.0F:
            timeLeft = interval
            light.spotAngle = Random.Range(minAngle, maxAngle)

    def Example():
        timeLeft = interval
        light.type = LightType.Spot