Gmail Nice Fuction

I get to know about dis interesting Gmail Theme from a fren of mine.. She told me dat Gmail got nice and colourful theme so dat we are not bored wif the previous dull theme.. So I'm starting curious about it.. and wanna to find it wat is the function dat my fren talking about..

Once I finished up my work, then I fast fast log in to my Gmail account.. and start trying out the nice function.. :D

Below are some of the print screen dat I captured during I'm playing around wif the function.. :D