public function run()
    {
        $output = PHP_EOL.$this->key().Colors::BG_BLACK.Colors::WHITE;
        return $output;
    }
public function run()
    {
        $output = PHP_EOL.$this->key().Colors::BG_BLACK.Colors::WHITE;
        return $output;
    }
public function run ( ) { $ output = PHP_EOL . $ this -> key ( ) . Colors :: BG_BLACK . Colors :: WHITE ; return $ output ; }
Execute Command.

@return void
Execute Command .