This is a great moc, not as great as my last palpatine moc which contained a curved window, but it is still an amazing and well thought out moc. (It also comes with a custom lego palpatine)
Step 1: The Floor
You need a good floor design that is very movie realistic and consists of light and dark gray lego bricks.
Step 2: The Walls
This is probably the hardest part because you have to get the black and sand-ish color blending in with the red.
Step 3: Palpatine
For this Palpatine figure I used the red robes and head from the elf in the hobbit, a red cape and gray hair from a quittich (I don't know how to spell it) match, and the blonde hair from the Clone Wars in this moc.