how can make a program for Multiple Object counting with Color Using OpenCV or any thing

I want to make a program for Multiple Object counting detection with Color Using OpenCV or any thing

my purpose is orange how many and tomatoes how many and apple how many in video and live camera not in image

https://youtu.be/5_ksFRoWiEU

[Walter Roberson]

https://www.mathworks.com/matlabcentral/answers/?term=tag%3A%22fruit%22

Except, of course, for the fact that some countries have declared that In Law, tomatoes should be considered vegetables instead of fruits.