Create a custom Master Page in SharePoint Foundation 2013

Hi,

I am new to SharePoint foundation.

I am trying to create a custom master page and save it as template, so that i can use it for all other sub sites. But i don't know where to start. Also i tries searching in Google, i got results for share point and not for share point foundation.

So, Please give me a step by step procedure or a link to step by step procedure on how to create a master page, save it as template and use it for a sub site.

Thanks in advance,

Gowtham R