Seems to me alextro has given you a great starting point..
What you have to do now, is adjust things so they suit you better..
"my 1st trouble is all the ball will have the same move"
It's unclear if you want to have the same move or not..
If not you could add randomness or adjust per ball depending on your requirements..
"If I use just 3 point like your capx file , I just only make a banana move"
You might want to try adding more points, although the math will probably become a bit more complicated..