anchor.diff:                              div.row
                                   -for(var i=0;i<25;i++)
                                       div.col
  -                                        div.upload-block.hoverable.grey.lighten-3
  -                                            i.material-icons.red-text.right highlight_off
  +                                        div.room-block.hoverable.grey.lighten-3
                                               div
  -                                                div.progress
  -                                                    div.indeterminate
  +                                                p 进入房间
               div.col.l3.m3.s4
                   div.card-panel.white.user
                       div.row
  
positive.code:     script.
          (function () {
              $('.slider').slider({full_width: true,interval:3000,indicators:false})
          })()
  
negative.code:                                 overflow-y scroll
                              .col
                                  padding 0.8rem
                                  .room-block
                                      position relative
                                      height 8rem
                                      width 8rem
                                      border-radius 3px
                                  .room-block
                                      > div
                                          transition 0.6s ease-out
                                          position absolute
                                          width 100%
                                          height 2rem
                                          line-height: 2rem
                                          bottom 0
                                          display none
                                          background #FFFFFF
                                          opacity 0.5
                                          cursor pointer
                                          p
                                              margin 0 auto
                                              text-align:center
                                  .room-block:hover
                                      > div
                                          display block
                      .user
  