now,it's going to come out
@mixin dynamicTriangle($color, $direction, $size: 6px, $position: absolute, $round: false){ @include pseudo($pos: $position); width: 0; height: 0; @if $round { border-radius: 3px; } @if $direction == down { border-left: $size solid transparent; border-right: $size solid transparent; border-top: $size solid $color; margin-top: 0 - round( $size / 2.5 ); } @else if $direction == up { border-left: $size solid transparent; border-right: $size solid transparent; border-bottom: $size solid $color; margin-bottom: 0 - round( $size / 2.5 ); } @else if $direction == right { border-top: $size solid transparent; border-bottom: $size solid transparent; border-left: $size solid $color; margin-right: -$size; } @else if $direction == left { border-top: $size solid transparent; border-bottom: $size solid transparent; border-right: $size solid $color; margin-left: -$size; } }