$primary-color=orange

$size=50px

​

html, body

  height 100%

body

  display flex

  align-items center

  justify-content center

div

  position relative

  &::after

    width $size

    height $size

    background $primary-color

    border-radius 100%

    box-shadow 0 0 0 ($size / 10) white, 0 0 0 ($size / 5) $primary-color

    display flex

    justify-content center

    align-items center

    content '1'

    color white

    font-size ($size / 5) * 3

  &::before

    width ($size / 10) + 1

    left 0

    right 0

    top -($size / 5 * 2)

    bottom -($size / 5 * 2)

    margin auto

    background $primary-color

    content ''

    position absolute

    z-index -1