.flex-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-around;
}

.flex-container > div {
  /*background-color: #f1f1f1;
  margin: 10px;
  padding: 20px;
  font-size: 30px;
  width: 20%;*/
}
.margin_0_13px{
    margin: 0 13px;
}

.float_left{
    float: left
}

.margin_left_115px{
    margin-left: 115px;
}

.margin_left_250px{
    margin-left: 250px;
}

.margin_left_20px{
    margin-left: 20px;
}

.margin_top_65px{
    margin-top: 65px;
}