hi, do yo know how i can create this (picture)
Hey!
your purpose is not quite clear, but I suggest trying _dupeedge and _loft command as well as providing the exact region of your red area 
Since you don’t have much to start from, I would probably draw straight lines first between the top and bottom geometry. Then you could rebuild the lines with a couple of control points and start manipulating them by hand with the gumball to get the final shapes.
Hello - please always supply a file if at all possible with the objects that you are asking about (not the whole projecet) - otherwise there is no good way to help and we’ll just guess.
-Pascal