Hi @cncgeorge,
For information related to arrays in JavaScript, please see mozilla or Oracle documentation. In general, an array can be declared as:
var arr = new Array();
Here is a link to a project that allows the creation and retention of multiple shape objects: Link. When you have time, please review this project and let me know if you have any questions.
Note: Within the project mentioned above, the object index should be defined before issuing a command.