.santa{
    display: inline-block;
    position: relative;
    margin-left: 800px;
    margin-top: -100px;
    animation-name: deer;
    animation-duration: 5s;
    animation-iteration-count: infinite;
    
    }
    
    @keyframes deer {
            100% {
            margin-left: 10px;
            margin-top: -400px;
                    }
                }