Slide wallpapers with Crebs in Ubuntu 10.04

Slide wallpapers with Crebs in Ubuntu 10.04;

1. press Alt-F2 on your keyboard:
gksu software-properties-gtk

or

System > Administration > Software sources
>Other Software>Add..:

3. ppa:crebs/ppa

4. sudo apt-get update;sudo apt-get upgrade;sudo apt-get install crebs

After installing,

5. press Alt-F2 on your keyboard, then type the command below: creb