The white dots on the Ubuntu 13.10 login screen leave something to be desired for some users. Here's how you can remove them.
1. Open a terminal window.
2. Type in the following commands then hit Enter after each.
sudo xhost +SI:localuser:lightdm
sudo su lightdm -s /bin/bash
gsettings set com.canonical.unity-greeter draw-grid false
Read more: Noobs Lab