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HTML

              
                <div id="winding"></div>
              
            
!

CSS

              
                // #divtober 20: Winding
// a.singlediv.com/divtober2020

black(alpha)
  rgba(0,0,0,alpha)

body
  min-height: 220px
  height: 100vh
  position: relative
  background-color: burlywood

div
  position: absolute
  left: 50%
  top: 50%

  &:before,
  &:after
    display: block
    content: ''
    position: absolute
    
  @media (max-width: 400px)
    &:not(.no-scale)
      transform: scale(.8)

#winding
  width: 15.5em
  height: 8em
  margin-left: -(@width/2 - .5em)
  margin-top: -(@height/2)
  background-repeat: no-repeat
  background-image: radial-gradient(circle, alpha(lemonchiffon,0) 25%,
                                            lemonchiffon 25.5%,
                                            lemonchiffon 50.5%,
                                            alpha(lemonchiffon,0) 51%),
                    radial-gradient(circle, alpha(khaki,0) 25%,
                                            khaki 25.5%,
                                            khaki 50%,
                                            alpha(khaki,0) 50.5%),
                    radial-gradient(circle, darken(saddlebrown,12) 50%, alpha(saddlebrown,0) 51%)
  background-size: 4em 4em,
                   4em 4em,
                   3.4em 3.4em
  background-position: 30% 0,
                       55% 0,
                       left -.45em bottom .8em
  border-radius: 0 4em 6em 0
  border-top:    .1em solid transparent
  border-right:  .7em solid saddlebrown
  border-bottom: .7em solid saddlebrown


  &:before
    width: 13.5em
    height: 5em
    bottom: -1em
    right: 2.6em
    background-color: chocolate
    background-repeat: no-repeat
    background-image: radial-gradient(circle, darken(saddlebrown,20) 50%, alpha(saddlebrown,0) 51%)
    background-size: 4.5em 4.5em
    background-position: right .3em bottom -1.3em
    border-top-left-radius: 10em 5em
    border-top-right-radius: 4em
    border-bottom-right-radius: 1em
    box-shadow: inset -1.8em 1.2em 0 black(.15)

  &:after
    width: 14em
    height: 10em
    right: 2.5em
    bottom: -1.5em
    background-repeat: no-repeat
    background-image: radial-gradient(circle at 50% 70%, darken(saddlebrown,3) 40%, alpha(saddlebrown,0) 41%),
                      radial-gradient(circle, darken(saddlebrown,20) 50%, alpha(saddlebrown,0) 51%),
                      radial-gradient(circle at 70% 50%, darken(saddlebrown,15) 40%, alpha(saddlebrown,0) 41%),
                      radial-gradient(circle, black 20%,
                                              #555 20%,
                                              #555 50%,
                                              black(0) 51%),
                      linear-gradient(to right, lemonchiffon 50%, khaki 50%),
                      radial-gradient(circle at 50% -.4em, #444 40%, black(0) 41%)
    background-size: 3.4em 3.4em,
                     .5em .5em,
                     1em 1em,
                     3.5em 3.5em,
                     1em 2.6em,
                     2em 1em
    background-position: left 1.9em bottom 3.1em,
                         left 1.7em bottom 2em,
                         left -.3em bottom .35em,
                         right .9em bottom -.3em,
                         56.5% 2.6em,
                         left 2em bottom -.5em
              
            
!

JS

              
                // @lynnandtonic
// a.singlediv.com

              
            
!
999px

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