Random wallpaper swapper

[neonix]

Hi guys.
I don't have any programming capabilities, but I like to invent some stuff. Could you guys can write a script, that will change a wallpaper every time I run TCL?

Option 1
1, When Linux is executing, the script will download txt file from the Internet.
2. In txt file there will be 10 links to jpg files.
3. The script will randomly choose one photo, download it from the Internet, and set it as a wallpaper.
Each time you run Linux, you will get a new wallpaper.

Option 2
A script that will change a wallpaper, each day to a different one. For example:
January has 31 days.
There is 31 links in txt file.
On January 1st, there will be photo01.jpg
On January 2nd, there will be photo02.jpg
And so on...

(Sorry for my English.)