Brick : RigidBody2D

using Godot;
using System;
using GameEnumerations;
public class Brick : RigidBody2D
{
    // Declare member variables here. Examples:
    // private int a = 2;
    // private string b = "text";

    // Called when the node enters the scene tree for the first time.
    AnimatedSprite sprite;
    Random rand;
    BrickColor[] colors = { BrickColor.blue, BrickColor.brown, BrickColor.darkgreen, BrickColor.green, BrickColor.grey,
                            BrickColor.lightblue, BrickColor.orange, BrickColor.yellow, BrickColor.red, BrickColor.purple };
    public override void _Ready()
    {
        rand = new Random();
        sprite = GetNode<AnimatedSprite>("AnimatedSprite");
        sprite.SetAnimation(rand.Next(0, colors.Length).ToString());
    }

//  // Called every frame. 'delta' is the elapsed time since the previous frame.
//  public override void _Process(float delta)
//  {
//      
//  }
}

BrickColorEnum.cs

namespace GameEnumerations
{
    public enum BrickColor
    {
        blue = 1,
        bluecracked = 2,
        brown = 3,
        browncracked = 4,
        darkgreen = 5,
        darkgreencracked = 6,
        green = 7,
        greencracked = 8,
        grey = 9,
        greycracked = 10,
        lightblue = 11,
        lightbluecracked = 12,
        orange = 13,
        orangecracked = 14,
        purple = 15,
        purplecracked = 16,
        red = 17,
        redcracked = 18,
        yellow = 19,
        yellowcracked = 20
    }
}