So the best way to start with that is to actually read the existing documentation.
Check the online manual, see the tutorials and check out the How do I FAQ for Construct 2 which contains users topics on how to implement specific mechanics, like the one you depicted.
Your assets are in regards to the type of game "Match3".
Using this keyword in the tutorials and forums, you should find all the help you need.
And if you have actual precise questions on how to do specific mechanic, you can then post to get help on the subject if you haven't found it already in the existing documentation.