div.sticky {
    position: sticky;
    top: 0;;
    margin-left: 60%;
    margin-right: 1%;
    margin-top: 1%;
    size: 40px;
    border: 20px transparent;
    background-color: #CAFFC1;
}
.img {

    position: absolute;
}

.hover_img {

    position: absolute;
    
    top: 0;
    
    left: 0;
    
    display: none;

    transition: background-color .3s;
    
}

.img:hover .hover_img {

    display: inline;
        
}
div.fixed {
    position: fixed;
    bottom: 5;
    right: 5;
    width: 300px;
    border: 3px solid #CAFFC1;
  }

div {

    background-image: url('img_flowers.jpg');
    background-repeat: no-repeat;
    border: 1px solid rgb(255, 255, 255);
}


























element:round-corner-preset {
    border-radius: 25px;
    padding: 20px;
    width: 200px;
    height: 150px;
}
* {
    box-sizing: border-box;
    font-family: "Comic Sans MS", "Comic Sans", cursive;     
    color: rgb(39, 58, 43);                                
}
html, body {
    margin: 0;
    padding: 0;
}
ul {
    margin: 0;
}
.background {
    background-image: url(background.png);
    background-size: 100% 100%;
}