*{
    margin: 0;
    padding: 0;
}
#background{
    background-image: url("../img/winter wonderland copyyy.png");
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    width: 100%;
    height: 100vh;
    position: fixed;   
    top: 0;
    left: 0;
    z-index: 1;          
}

.arrow { 
        position: absolute; 
        background: none; 
        width: 3em; 
        height: 3em; 
    }
    #uArrow { 
        top:0px; width: 100%; 
    }
    #dArrow { 
        bottom:0px; width: 100%; 
    }
    #lArrow { 
        left:0px; height: 100%; 
    }
    #rArrow { 
        right:0px; height: 100%; 
      }