The Harry Potter Room...

this 1 is cool. :)

well which house do u like best for ex: griffindor the dinding can be red and yellow atau anda can do a darker shade of blue and get some harry potter fatheads (wall stickers) and some glow in the dark stars that stick to the dinding happy decorating

warna in yellow, jeruk, orange and red could be appropriate. anda may either buy some Gryffindor stuff atau make them, for example. atau get inspired oleh the movie Gryffindor Common Room. That is, if anda feel like belonging to that House. anda may choose another house, with another set of colours and props.

Depends on how extreme anda want to go.
4 walls, 4 houses - two thick stripes vertically. Red and Golden for Gryffindor, silver and green for Slytherin, etc. Black cover onto the tempat tidur with Hogwarts crest on. anda can also get posters of the crests for each walls. A HP posters, a Snitch hanged from the ceiling.

atau anda can select a house and go after that: leather stuff with some vintage wallpaper (gray background green pattern) with green border/dark yellow walls with red border and Gryffindor crest, red chair, carpet in Victorian style...

atau anda can go Great Hall style. Some matte color onto the dinding (grayish brown) and paint candles in eye level and open sky onto the ceiling. anda can put the crests onto the walls and get HP style jam glasses (test tubes filled with colored sand). Posters, scarves, lava lamps (yellow and red ones).

atau there's the Black style. Stylish wallpaper classical furniture Gryffindor and Hogwarts crest, Marauders poster, motorcycle poster, bikini girl poster (or pants guy if anda are a girl), family pohon (poster atau a painted pohon oleh your own lil hands with pictures of Bella, Malfoys etc above the names). And a name board onto your door like Regulus Arcturus Black. Dependant on how hard core anda are, anda can cut Dobby's and Kreacher's heads from posters and stick them onto the dinding (joking). Black family crest is compulsory.

atau Ron one... Quidditch oriented. Harry playing, Cannons poster, Viktor Krum poster, Irish Hat, textile Clovers, brooms, Snitch hanged from the ceiling.

atau Harry Style: totally ordinary bedroom with a calendar on the dinding counting back the days till the 1st of September and a whiny bird in a cage. :DD

Good luck.

What house are anda in!?

Thats a big deal, like Im Slytherin, so I have green walls in my bedroom, with like a silver and green bed-set. I have snake-themed furniture and a slytherin pillow/throw blanket. (You can buy those online for any house.)
I have Harry Potter posters on my walls, and I painted some of my favorit quotes.
And the Deathly Hallows symbol is also painted there.

Over my bed, I have the Hogwarts crest (its like a REALLY big sticker I bought online)

Thats what I did. But anda could do something similar, with your own personal favorites. (If ur not a slytherin, change the colors, my posters are Severus, Draco, Bellatrix etc, so if those arent your favorites, change them!

anda could do something like this i wouldent overdo it too much