old_contents: from django.conf.urls import url
  from Overlay import views
  
  urlpatterns = [
      url(r'^$', views.basic, name='basic')
  ]
  
new_contents: from django.conf.urls import url
  from Overlay import views
  
  urlpatterns = [
      url(r'^$', views.basic, name='basic'),
      url(r'^(?P<county>[^0-9]+)/$', views.year, name='years'),
  ]
  
subject: Update urls.py