*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body{
    width: 100%;
    height: 100vh;
    background-color: #111;
    overflow: hidden;
}
.cursor{
position: relative;
width: 100px;
height: 100px;
}
.circle{

    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient( #00d0ff , #ff005e);
    border-radius: 50%;

}