.img_box{
      animation: img_box_9955 3s linear infinite;
      transform-origin: 50% 50%;
      margin: 1rem 0 !important;
    }
     
    @keyframes img_box_9955 {
      0% { transform: translateY(0) }
      33.33333% { transform: translateY(-10px) }
      66.66667% { transform: translateY(0) }
      100% { transform: translateY(0) }
    }