.middle-right {
  @include middle-position(40%);
  right: 20px;
}

.middle-left {
  @include middle-position(40%);
  left: 20px;

}

.middle-top {
  @include middle-position(20px);
  left: 40%;
}

.middle {
  @include middle-position(40%);
  left: 40%;
}

.middle-bottom {
  @include bot-position();
  left: 40%;
}