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Code Indentation

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                <ul class="list">



                // 背景色の設定
$bg-color: #00BBF0;

// .current要素の背景色を変更
	color: #fff;
	background-color: $bg-color;
	padding: 0.5em;
	font-size: 1.5em;


                // LIの最後の要素を取得
var li = document.querySelector( ".list li:last-child" );
// クラス名を追加
li.classList.add( "current" );