That is, the when light source is extinguished, only the first or exterior design element 130 is displayed to {HEAD ~ a viewer} of {TAIL ~ the cover exterior} 
That is , the when light source is extinguished , only the first or exterior design element 130 is displayed to { HEAD ~ a viewer } of { TAIL ~ the cover exterior }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL