*,
*:before,
*:after{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}
body{
    height: 100vh;
    display: grid;
    place-items: center;
}
.container{
    height: 67.5vmin;
    width: 95vmin;
    position: relative;
    overflow: hidden;
}
img{
    width: 100%;
    height: 100%;
    position: absolute;
}
#my-img{
    clip-path: polygon(0 0 , 50% 0, 50% 100%, 0 100%);
}
#slider{
    position: relative;
    -webkit-appearance: none;
    width: calc( 100% + 40px);
    height: 100%;
    margin-left: -20px;
    background-color: transparent;
    outline: none;
}
#slider::-webkit-slider-thumb{
    -webkit-appearance: none;
    height: 40px;
    width: 40px;
    background: url("slider-icon.svg"),
    rgba(255,255,255,0.3);
    border: 3px solid #ffffff;
    border-radius: 50%;
    background-size: contain;
    cursor: pointer;
}