Gnome / GUI Linux ( Centos ) How to make sure every icon is either a folder or a file that all look alike?

Gnome / GUI Linux ( Centos ) How to make sure every icon is either a
folder or a file that all look alike?

Dear Sir/Madam
it seems obvious human mind goes to places by looking at
the designs of icons.
I need to not look at designs. i need to simply know if
something is a folder or a file.
i do not want to see any other icon in my desktop.
perhaps this will permit me not to leak thoughts to
different direction, and i might become healthier as a result.
how can i go about this ?
so far the only solution i found is, deleting the folder
/user/share/icons/
completely, but now all icons are blank white. even for folders.
i need 2 custom icons, 1 for folders, and 1 for files.
i do not want to see any other icon in my desktop except for application's
gui's of course.