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HTML

CSS

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HTML

              
                // no Div xD

              
            
!

CSS

              
                html
	display flex
	justify-content center
	align-items center
	min-height 100vh

body
	animation borderColor 5s infinite ease-in-out
	position relative
	width 210px
	height @width
	border-radius 73px
	border 22px solid #000
	

	&:before
	&:after
		content ''
		position absolute
		animation flash 3s infinite ease, borderColor 5s infinite ease-in-out
	
	&:before
		top 22px
		right @top
		border 15px solid #000
		border-radius 50%
	
&:after
		border 22px solid #000
		border-radius 50%
		width 85px
		height @width
		top calc(50% - 85px + 22px)
		left @top


@keyframes borderColor
	0%
		border-color #0E68CE
	25%
		border-color #F44747
	50%
		border-color #EEDC31
	75%
		border-color #7FDB6A
	100%
		border-color #0E68CE

@keyframes flash
	0%, 89%
		transform scaleY(1)
	90%
		transform scaleY(.2)
	100%
		transform scaleY(1)
              
            
!

JS

              
                
              
            
!
999px

Console