duck

using UnityEngine;
using System.Collections;
using System.Collections.Generic;

public class Shape : MonoBehaviour {

    public static List<Shape> shapes = new List<Shape>();

    void Start () {
        shapes.Add(this);
    }

    public static DestroyAll()
    {
        foreach (Shape shape in shapes)
        {
            shape.Kill();
        }
    }

    public void Kill()
    {
        // Spawn "destroy" visual effect
        shapes.Remove(this);
        Destroy(gameObject);
    }
}