.tenmetsu{
           -webkit-animation:blink 0.7s ease-in-out infinite alternate;
           -moz-animation:blink 0.7s ease-in-out infinite alternate;
           animation:blink 0.7s ease-in-out infinite alternate;
         }

@-webkit-keyframes blink{
                          0% {opacity:0.3;}
                          100% {opacity:1;}
                        }

@-moz-keyframes blink{
                       0% {opacity:0.3;}
                       100% {opacity:1;}
                     } 

@keyframes blink{
                  0% {opacity:0.3;}
                  100% {opacity:1;
                }