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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

              $color_white: #fbfbfc
$color_blue_light: #96ceed
$color_blue_dark: #4472C4
$color_orange: #ed7057

   margin-left: -200px
   margin-top: 130px
   display: flex
   justify-content: center
   // background: linear-gradient(to right, #7f00ff, #e100ff)
   background-color: $color_blue_dark
   margin-top: 200px
   padding: 36px
   display: flex
   align-items: center
   flex-direction: column
   width: 310px
   height: 170px
   border-radius: 20px
   cursor: pointer
   // background: linear-gradient(to top, #e100ff, #7f00ff, #7f00ff)
   background-color: $color_orange
   color: white
   font-family: 'Lato', sans-serif
   z-index: 1
   box-shadow: 5px 5px 15px #000

   margin-bottom: -20px
   font-size: 20px
   margin-top: 30px
   margin-left: 5px
   height: 30px
   width: 200px
   border-radius: 3px
   border: 1px solid #fff
   padding: 5px
   outline: #f24

   width: 80px
   height: 80px
   border-radius: 50%
   background-color: #D51E05
   margin-left: -25px
   width: 80px
   height: 80px
   border-radius: 50%
   background-color: #EEAB05
   margin-top: -80px
   margin-left: 25px

   width: 60px
   height: 80px
   margin-top: 20px
   border-radius: 5px
   margin-left: -230px
   background-color: #000

   margin-left: 40px
   width: 400px
   overflow: hidden
   margin-left: -230px
   margin-top: -30px
   font-size: 15px
              class MasterCard extends React.Component{
      this.state = {
         card_num: "2893-0232-3093-2112"
      if(this.state.card_num === "hotpink"){
            card_num: "2893-0232-3093-2112"
            card_num: "2893-0232-3093-2112"
      const styleObj = {
         // backgroundColor: this.state.color,
         fontSize: 32 / 2
            <div class="card" style={styleObj} id="hello-world">
               <div id="circle">
                  <div id="circle1"></div>
                  <div id="circle2"></div>
                  <span id="mastercard_words">MasterCard</span>
               <div id="idcard">
               <span id="user_name">Ya-Yun Tsai</span>
            <h2 onClick={this.togglecard_num.bind(this)}> {this.state.card_num} </h2>
            <span id="card_num">Card Number</span><input value={this.state.card_num} onChange={this.changecard_num.bind(this)}/>

ReactDOM.render(<MasterCard name="Annie"/>, document.getElementById("app"));

// var Helloworld = React.createClass({
//    render: function(){
//       return(
//          <h2>Hello world! </h2>
//       );
//    }
// })
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