Update from iOS 6

I have Iphone 4S, Yesterday I Updated it with latest iOS 6, and after that it gets me only chance to update ti iOS 8. I saw in your site that I can Update it manually and download the installation file for iOS 7.1.2.
My question is can I update directly from my latest iOS 6 to iOS 7.1.2 or I should first install iOS 7, then iOS 7.0.1 ; 7.0.2; 7.0.3 and all till 7.1.2 ?
Also If I first need to install first 7.0, after that can I skip other 7.... and install 7.1.2 or I still need to install them one by one till the latest ?

Georgi V.