Forum:Need help creating level effect!!!

I love creating levels on LBP, and recently I have seen levels were the level is timed and at the end of the timer gas comes across the screen and kills the player, where they then end up at the score board. I was wondering if anyone could help me out with how this effect is accomplished. It looks like the horrible gas tool(in varing colors).

Of course. I wouldnt mind helping out. Im a die hard LBP addict. First, get some kind of a magnetic key switch. Next, attach a magnet key to a piston leading it to the switch. Now, make a "permanant direction switch". PSN user Jayman-121 has a pretty effective one. Lets say it's a permanant dissolve switch. At the beginning of this "timed trial", put in a switch to evaporatethe the dissolve, thus moving the key toward the switch gradually, at a pace slow enough for sackboy to finish the stage. Once the key reaches the swich, (it needs to be a directional switch) have a lrge piece of gas the size of the room come down via a piston at a swift rate (0.1 seconds does nice) thus, killing sackboy instantly. Also, get scoreboard, put a checkpoint over it, and have the same switch that dissolved the disolve activate the checkpoint, so that when and if the gas comes down,the checkpoint is already activated... I believe they call that method the "Teleporter technique". I believe that should do. Hope it works out okay. =P