Map<String,VideoPlayerController> controllers = {
      'one${1+1}' : VideoPlayerController.asset('assets/videos/6.mp4'),
      'one${1+2}' : VideoPlayerController.asset('assets/videos/2.mp4'),
      'one${1+3}' : VideoPlayerController.asset('assets/videos/3.mp4'),
      'one${1+4}' : VideoPlayerController.asset('assets/videos/4.mp4'),
      'one${1+6}' : VideoPlayerController.asset('assets/videos/1.mp4'),
      'one${1+7}' : VideoPlayerController.asset('assets/videos/7.mp4'),
      'one${1+8}' : VideoPlayerController.asset('assets/videos/8.mp4'),
      };

controllerLooper3(){
 for (value in controllers.values){
return value;
 }
 }