@mixin position($position, $top: null, $right: null, $bottom: null, $left: null) {
  position: $position;
  top: $top;
  right: $right;
  bottom: $bottom;
  left: $left;
}


@mixin absolute($top: null, $right: null, $bottom: null, $left: null) {
  @include position(absolute, $top, $right, $bottom, $left);
}

@mixin relative($top: null, $right: null, $bottom: null, $left: null) {
  @include position(relative, $top, $right, $bottom, $left);
}

@mixin fixed($top: null, $right: null, $bottom: null, $left: null) {
  @include position(fixed, $top, $right, $bottom, $left);
}