BeryFPS

Hello, I'm new here and I'm sorry if I will make topic on wrong forum. I saw this really cool banner of World Of Tanks somewhere in the internet (and also i found it on the greensock forums) and I have question. Banner: http://cdn2.worldoftanks.com/d_parhimovich/fbatwork/banners/wot/sniper_sight/ At the end of the banner, these is [ BATTLE ] button that increases in scale when I touch it and decreases when i move cursor out of it. I tried searching for tutorials how to make this in Google Web Designer, but didn't find any. Can anyone help please? Thanks