What pattern(s) to use for this system ?

public abstract class Drawable
{
        private VertexBuffer _buffer;

        public abstract void Render();

        public void SetData()
        {
                // Upload data to buffer
        }
}

public class Rectangle : Drawable
{
        public Rectangle()
        {
                // Sending an array of 4 colored vertices
                var array = ...
                base.SetData(array);
        }

        public int X;
        public int Y;
        public int Width:
        public Height;

        public override void Render()
        {
                // Render the object with OpenGL
        }
}