The Harry Potter Room...

this 1 is cool. :)

well which house do u like best for ex: griffindor the दीवार can be red and yellow या आप 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 दीवार happy decorating

रंग in yellow, नारंगी, ऑरेंज and red could be appropriate. आप may either buy some Gryffindor stuff या make them, for example. या get inspired द्वारा the movie Gryffindor Common Room. That is, if आप feel like belonging to that House. आप may choose another house, with another set of colours and props.

Depends on how extreme आप 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 बिस्तर with Hogwarts crest on. आप can also get posters of the crests for each walls. A HP posters, a Snitch hanged from the ceiling.

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

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

या there's the Black style. Stylish वॉलपेपर classical furniture Gryffindor and Hogwarts crest, Marauders poster, motorcycle poster, bikini girl poster (or pants guy if आप are a girl), family पेड़ (poster या a painted पेड़ द्वारा 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 आप are, आप can cut Dobby's and Kreacher's heads from posters and stick them onto the दीवार (joking). Black family crest is compulsory.

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

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

Good luck.

What house are आप 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 प्रिय 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 आप 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!

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