.bar-wrapper {
    height: 300px;
    position: relative;
}
.bar {
    position: relative;
    bottom: 0;
    width: 5px;
    display: inline-block;
    border: 1px solid red;
    height: 5px;
    border-bottom: 3px solid #fff;
}
#music-canvas {
	opacity:0.25;
	position: fixed;
	height:30%;
	width:50%;
	
	bottom:0%;
	left:0%;
	z-index=-1;
}