@mixin type4($type, $property, $screen-n){
    @if($type == 4){
        $list: map-get($property, list);
        $values: map-get($property, values);
        @each $class, $property in $list {
            @if($class == placeholder){
                @each $name, $color in $values {
                    .#{$screen-n}#{$class}-#{$name}::#{$class}{
                        #{$property}:$color;
                    }
                }
            }
            @each $name, $color in $values {
                .#{$screen-n}#{$class}-#{$name}{
                    #{$property}:$color;
                }
            }
        }
    }
}