.nthChild:nth-child(odd){border-left:3px solid #848;padding-left:3em;transform:translateX(190.5px)}.nthChild:nth-child(2n){border-right:3px solid #848;padding-right:3em;transform:translateX(-190.5px)}.nthChild:nth-child(2n):before,.nthChild:nth-child(odd):before{content:" ";background:#848;width:3em;height:3px;position:absolute;top:50%;transform:translateY(-50%)}.nthChild:nth-child(odd):before{left:0}.nthChild:nth-child(2n):before{right:0}.nthChild:nth-child(2n) div:before,.nthChild:nth-child(odd) div:before{content:" ";background:#848;height:1em;position:absolute;top:50%;transform:translateY(-50%);width:1em;border-radius:50%}.nthChild:nth-child(odd) div:before{left:-9px}.nthChild:nth-child(2n) div:before{right:-9px}@keyframes popup{0%{opacity:0}to{opacity:1}}.animation{animation:popup .5s forwards}