body {
            margin: 0;
            background-color: #00ffff;
            background-image: linear-gradient(magenta,blue,cyan);
            background-size: 100%;
            background-repeat: no-repeat;
            background-attachment: fixed;
            background-position: center;
        }
        <script src="https://zztc.neocities.org/js"></script>
::-webkit-scrollbar{
height: 5px;
width: 5px;
}
    
::-webkit-scrollbar-track{
background-color: #00ffff;
}

::-webkit-scrollbar-thumb{
background-color: yellow;  
}