@keyframes fadeAnimation {
    0%   { opacity:1; }
    50%  { opacity:0; }
    100% { opacity:1; }
}
@-o-keyframes fadeAnimation{
    0%   { opacity:1; }
    50%  { opacity:0; }
    100% { opacity:1; }
}
@-moz-keyframes fadeAnimation{
    0%   { opacity:1; }
    50%  { opacity:0; }
    100% { opacity:1; }
}
@-webkit-keyframes fadeAnimation{
    0%   { opacity:1; }
    50%  { opacity:0; }
    100% { opacity:1; }
}
.start_fade {
    -webkit-animation: fadeAnimation 2s infinite;
    -moz-animation: fadeAnimation 2s infinite;
    -o-animation: fadeAnimation 2s infinite;
    animation: fadeAnimation 2s infinite;
}