I have an image, on an image there are three things Spoon, Cup and basket.
Now I have to identify when user click on image nothing will happen until and unless the user click on spoon, cup & basket.

If user click on spoon the spoon colour will become green. 
Same for cup and basket.

And I have no idea how to do this. I want some hints from experts and how and where to start?

Any idea or suggestions would be highly welcome.