main.css

body {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
  font: 1em sans-serif;
  height: 100vh;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
}

section.main {
  text-align: center;
}

.logo-wrapper {
  margin: 20px auto;
  display: inline-block;
  position: relative;
  left: 20px;
}

.rect {
  width: 20px;
  background: red;
  height: 60px;
  float: left;
  position: relative;
  margin-right: 30px;
  margin-left: -10px;
}

.rect:last-child:before,
.rect:last-child:after {
  display: none;
}

.rect:after {
  width: 20px;
  background: white;
  height: 60px;
  position: absolute;
  display: block;
  top: 0;
  left: 20px;
  content: "";
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
}

.rect:before {
  width: 20px;
  background: white;
  height: 20px;
  border: red solid 20px;
  position: absolute;
  display: block;
  top: -30px;
  left: 0;
  content: "";
  border-radius: 100%;
}