body {
  background-color: #c0c0c0;
}
:root { 
    --cassiopeia-color-primary: #00ff00; 
}
.blink {
    animation-name: animation_blink;
    animation-timing-function: ease-in;
    animation-duration: 2s; 
    animation-iteration-count: infinite;            
}

@keyframes animation_blink {
    0% { opacity: 1; }
    50% { opacity: 0.1; }
    100% { opacity: 1; }    
}