text: 
  from flask import Flask, render_template, Response, request
  from camera import VideoCamera
  import time
  import os
  
  app = Flask(__name__)
  #app = Flask(__name__, template_folder='/var/www/html/templates')
  
  #background process happening without any refreshing
  @app.route('/left')
  def left():
      print ("Left")
      os.system("python servo.py 1 2 0.1 1")       
      return ("nothing")
  
  @app.route('/center')
  def center():
      print ("Center")
      os.system("python servo.py 89 90 0.3 1")       
      return ("nothing")
  
  @app.route('/right')
  def right():
      print ("Right")
      os.system("python servo.py 179 180 0.1 1")       
      return ("nothing")
  
  
  @app.route('/', methods=['GET', 'POST'])
  def move():
      result = ""
      if request.method == 'POST':
          
          return render_template('index.html', res_str=result)
                          
      return render_template('index.html')
  
  
  def gen(camera):
      while True:
          frame = camera.get_frame()
          yield (b'--frame\r\n'
                 b'Content-Type: image/jpeg\r\n\r\n' + frame + b'\r\n\r\n')
  
  @app.route('/video_feed')
  def video_feed():
      return Response(gen(VideoCamera()),
                      mimetype='multipart/x-mixed-replace; boundary=frame')
  
  if __name__ == '__main__':
      app.run(host='0.0.0.0', debug=True, threaded=True)
  