a{
            text-decoration: none;
        }
        .h1{
            text-align: center;
        }
        .h2{
            border: 2px solid black;
            border-radius:6px;
            text-align: center;
            line-height: 50px;
            width: 200px;
            height: 35px;
            color: #0f0f0f;
            background: #28a4c9;
        }
        #a1{
            position: fixed;
            bottom: 20px;
            left: 20px;
            text-decoration: none;
            border: 2px solid #00e765;
            border-radius:6px;
            background: #00e765;
        }
        * {
            margin: 0;
            padding: 0;
        }

        #container {
            width: 100%;
            height: 100%;
            margin: 0 auto;
            position: relative;
        }
        .line {
            position: absolute;
            cursor: default;
        }

        .lineS {
            font-size: 1px;
            opacity: 0;
            border-radius: 2.5px;
            position: absolute;
            transition:1s;
            position: absolute;
            cursor: default;
        }
        .close1{
            font-size: 16px;
        }
        .open1{
            font-size: 16px;
        }
        .hiddencss{
              display:none;
        }
        .close2{
            font-size: 16px;
        }
        .open2{
            font-size: 16px;
       .close3{
            font-size: 16px;
        }
        .open3{
            font-size: 16px;
        .close4{
            font-size: 16px;
        }
        .open4{
            font-size: 16px;