What's the name of this movie?

All i remember from that movie is, a group of peoples who were trapped in the place which is full of white rooms & when they try to take exit from the one room they again come to same room. & also One electric wave which comes after some time and kill the people who comes in their way. They all died one by one. All rooms were white in colors with 4 walls. There is no door in that room but solid steel window like frame was there everywhere in the room which are used to move from one room to another. In the end one girl was able to escape from that place.