svm-style.css

.svm-example {
  position: relative;
  height: 60px;
  width: 340px;
  margin: 1.5em auto;
  line-height: 60px;
}
.svm-example div {
  position: absolute;
  top: 10px;
  height: 40px;
  width: 40px;
  border-radius: 32px;
  line-height: 40px;
  font-family: Arial;
  color: #FFF;
  text-align: center;
}
.svm-example .decision-boundary {
  top: 0px;
  height: 60px;
  width: 2px;
  background-color: #C4C4C4;
  border-radius: 0;
}
.svm-example .blue { background-color: #48B; }
.svm-example .red { background-color: #D44; }
.svm-example .a { left: 0px; }
.svm-example .b { left: 70px; }
.svm-example .c { left: 140px; }
.svm-example .z { left: 200px; }
.svm-example .y { left: 300px; }