.light{border-radius:100%;height:25vh;width:25vh}.light-red{background-color:hsl(0,10%,50%)}.light-red.on{background-color:red}.light-amber{background-color:hsl(60,10%,50%)}.light-amber.on{background-color:#ff0}.light-green{background-color:hsl(120,10%,50%)}.light-green.on{background-color:lime}