Raymudas Martini,
I debate this subject with many materialistic atheist PhD scientists,...
First, your patronizing language says something about you. Saying "materialistic scientists" you sound like Donald Trump when he says "The Blacks".
and they cannot give me one positive mutation from any species that caused a positive change for survival.
Second, that knowledge is known by a few experts in biology. I've seen many examples of genetic change given in which the specific mutation is linked to a specific position in chromosome.