Good day everyone!
I am starting on a project which uses arduino and a GSM module (A6 by AI thinker).
attached below is the desired outcome of the whole system.
The problem is I am new to the knowledge of using processing software to interact its GUI with arduino.
Any suggestions on what software would I use to make it easier or less complicated?
I don’t quite understand on how every phone numbers as input will be stored and would be sent and read by the arduino. 
One more thing. Can you show me a sample code of a loop for sending sms one at a time for each phone numbers being registered?
Thank you in advance!