.wrapper{
text-align: center;
background-image:
linear-gradient(transparent calc(49%), skyblue calc(49%), transparent calc(49% + 1px)),
linear-gradient(transparent calc(49%), skyblue calc(49%), transparent calc(49% + 1px));
background-size: calc(45% - 80px);
background-repeat: no-repeat;
background-position: 0 0, 100% 0;
}