Change Screen Saver

I have the nokia 6015 and the only one screensaver i get it that bored clock,
how can i change it?

I dont know much about the 6015, but I think,like most nokia's, the clock is a default screen saver to save battery life, by only using fewer pixels, color screen savers drain battery power.

Some phones including yours, the screensaver cant be changed, by any bug or hack or non-nokia product, the clock is default and unchangeable