Help::Download Client?

I know i sound like a complete idiot when i ask this but
Can someone show me the step by step way to download and play i runescape client?
Ive been trying on my own and i can't seem to figure it out

Oh please post pics of what im supposed to do would be awesome
Thanks

 

Do you mean the official runescape client? Or an unofficial, like SwiftKit.
Or do you mean a private server client?

 

Private server clients

 

look through the file and find compile click it it might just compile or it will giver you instructions then click run or run.bat and it will run =)