You also can't c & p from the description either. That just is another fail right there.
Instead of your simple no effort attempt aka this:
I Create a false surrounding witch can change the way of an object or area looks.
You should try for something way more specific, detailed, and full of effort, like so:
I form the handseals slowly, focusing my chakra into the area around us whilst doing so. I then get to the last handseal, and the genjutsu is implemented. The genjutsu makes the area around us transform from into an open plain into a cold and barren tundra.
Now don't c & p my example either. I'll know if you do. It's just something that i expect. Effort and detail. Not laziness and simplicity. Now, in all seriousness, REALLY ATTEMPT THE GENJUTSU THIS TIME.