.chart1 img {
  width: 20%;
  float: left;
  margin: 1.4em;
}
.picture {
  list-style: none;
  float: left;
  margin: 2%;
}
.picture a {
  display: block;
  text-align: center;
}
.picture a span {
  color: #428bca;
  display: block;
  text-align: center;
}