Responsive-ness for the Images being displayed

[Dxuian]

feature request

I managed to tweak the config file on my own system and can push out a PR as soon as possible for this
the feature is as in the topic --- different image sizes for different terminal sizes
i also managed to alter the flow in a way that selects a random image from a particular
folder so the user can instead make a images folder rather than a single image displayed every instance

[rashil2000]

All these changes are a part of the config file, right? Can you show me the changes