Break point mixin

@mixin bp($point) {
    @if ($MQs) {
        $bp-sm: "(min-width: #{$screen-sm})";
        $bp-md: "(min-width: #{$screen-md})";
        $bp-lg: "(min-width: #{$screen-lg})";
        $bp-xl: "(min-width: #{$screen-xl})";
        $bp-xxl: "(min-width: #{$screen-xxl})";

        @if $point == sm {
            @media #{$bp-sm} { @content; }
        }
        @else if $point == md {
            @media #{$bp-md} { @content; }
        }
        @else if $point == lg {
            @media #{$bp-lg} { @content; }
        }
        @else if $point == xl {
            @media #{$bp-xl} { @content; }
        }
        @else if $point == xxl {
            @media #{$bp-xxl} { @content; }
        }
        @else {
            @media(min-width: $point) { @content; }
        }
    }
}