how to scale AWS Kinesis and analytics with multiple stream

I have 2 streams and I am using analytics Zeppelin notebook to merge the 2 streams but in the future, i will be using more streams I want to know if it's possible to scale everything so it automatically adjusts to the increase of the streams. i.e., right now the 2 streams are being joined and the data is being sent to s3, what i want to happen is that is I increase the number of the streams to 3 then I want the 3 streams to be joined together and then that data be placed in aws s3. how do I go about doing that?