# Introduction
close#9965
When landing on twenty you should be able to see a white screen
flickering if you had setup dark mode.
This is because before the SPA has been loaded we're not displaying
anything, which in a white screen from the browser.
During this period we should display a background color following the
user's device theme.
## Reproduction
In order to reproduce this behavior define a fast 4G connection from
your network console.
## Cons
Device mode might not the one chosen afterwards when the user has been
authenticated
=> We should store appearance settings in the local storage in order to
optimistically render the default "loading" background ( wouldn't be
100% bullet proof for instance if the user is now unauth for some reason
)
Body background will be override by theme after app bootstrap
d6171c66df