body
{
    background-image: url("sea.jpg");
}

.shake {
  animation: shake 0.5s;
  animation-iteration-count: 1;
}

@keyframes shake {
  0%   { transform: translate(1px, 1px)   rotate(0deg);   filter: brightness(1);   }
  10%  { transform: translate(-1px,-2px)  rotate(-1deg);  filter: brightness(1.25);}
  20%  { transform: translate(-3px, 0px)  rotate(1deg);   filter: brightness(1.5); }
  30%  { transform: translate(3px, 2px)   rotate(0deg);   filter: brightness(1.25);}
  40%  { transform: translate(1px,-1px)   rotate(1deg);   filter: brightness(1);   }
  50%  { transform: translate(-1px, 2px)  rotate(-1deg);  }
  60%  { transform: translate(-3px, 1px)  rotate(0deg);   }
  70%  { transform: translate(3px, 1px)   rotate(-1deg);  }
  80%  { transform: translate(-1px,-1px)  rotate(1deg);   }
  90%  { transform: translate(1px, 2px)   rotate(0deg);   }
  100% { transform: translate(1px,-2px)   rotate(-1deg);  }
}