JAVA data parser via json API

Good afternoon, dear performer.
You need to write a parser with work through the instagram API.
The point of the parser is this:
There's a square with coordinates:
0;0 10;0 10;10 0;10
It is necessary to change the coordinates in each request to collect information in the square with a certain step.
For example: send a request to collect data from the page with coordinates 0;0, then 0;1, 0;2 0;3. 1;0, 1;1, 1;2. 2;0, 2;1, 2;2... 3;0, 3;1, 3;2. 10;0, 10;1, 10;2....10;10 Here step = 1. We need to be able to change the pitch.
+ All collected data - write to txt file.
The parsing will be with JSON format.
I also need the ability to set the square according to my coordinates, which I need.
It would be great if you could use different shapes to collect data, other than a square. Like a six- or an octagon.
I think so.