appearances arid Cacti cactus clumps clusters coloring colors colouring colours display edge edges flora garden garden-display garden-plants irregular leaves light ornamental perennials plants pointed protection shape shapes sharp short-spikes small-spines spikes spines spiny succulents surface surfaces textures unusual green sunlight abstract appearance artwork background colored colorful coloured colourful contrast contrasting design Designs expression grouting linear lined lines mosaic patterns rows shiny smooth square squares textured tiled tiles variety various wall wall-tiles danger dangers artistic bits blue broken chipped chips cracked cracks gray grey horizontal interconnected interlaced interlinked intertwined interwoven number numeral seven shaped white