Help with oUF

[Sinaris]

Hi guys,

sorry for my bad english but normaly i write in german

here is my question:

my old interface based on eepanels and bartender is very slow. the performance is very bad. now i have to write something with oUF

but i cant find a tutorial to build a frame like eepanels. i know that i have to edit all my stuff in the lua files. but how can i build a frame like:

250 width and 150 height on the left side of bottom?

is there anybody who can tell me plz :P