ha card mod animation for screen burn protection

- type: custom:stack-in-card
        card_mod:
          style: |
            ha-card {
              position: relative;
              animation-name: burnInPrevention;
              animation-duration: 210s;
              animation-iteration-count: infinite;
              animation-timing-function: ease-in-out;
            }
            @keyframes burnInPrevention {
              0%, 90% {
                transform: translate(0, 0);
                opacity: 1;
              }
              92% {
                transform: translate(20px, 15px);
                opacity: 0.7;
              }
              94% {
                transform: translate(-20px, -15px);
                opacity: 0.4;
              }
              96% {
                transform: translate(15px, -20px);
                opacity: 0.7;
              }
              98% {
                transform: translate(-15px, 20px);
                opacity: 0.4;
              }
              100% {
                transform: translate(0, 0);
                opacity: 1;
              }
            }
        cards: