Seftikara Al Mayasir

@SamuelYaron thank you for your responses, i found it.

hello, i'm basically a java programmer, and just started to learn about Minecraft FML API. i have read forge documentation and understands it a bit. i have opened some beginner's guide to minecraft modding, and i have some basic understanding about it. and now, i want to open some vanilla/default minecraft blocks source code, which i can read and learn from, then modify it for testing. but i couldn't find any. i tried searching for an alternative, downloading some existing mods and learn from it, but almost all of them already using advanced system which i couldn't understand. my question is: is there any mod or source (of blocks, items, etc.) which i can learn from? so i can first manipulate the code and create duplicate of existing block and learn every code and behavior by practice. (the reason why i asked this question: i want to create some TileEntity (likely) that responds redstone signal and process something inside it, and then i realized, vanilla blocks and items have the basic functionality i needed and i only have to combine and modify them. it just my first step before creating custom block behavior of my own, but i stuck here.)