Here there is a simple gravel surface with inexpensive pieces of concrete painted blue and set in it so as to tauten the surface and make it as visually strong as the vertical surrounding elements.

• 屋面上铺著一层简单的砾石，并嵌入一些漆成蓝色的混凝土版，以绷紧这表面；同时，使它在视觉上能像周围的垂直元素一样地强烈。