hey I need help with creating a code for a calculator. I have created the design(as in the app picture) for it. I jus need the code to follow with the basic calculator app design i created. I need the

hey I need help with creating a code for a calculator. I have created the design(as in the app picture) for it. I jus need the code to follow with the basic calculator app design i created. I need the app to have a function, lists, parameter, and An algorithm (that includes sequencing, selection, and iteration). This program is on code.org and has to be in JavaScript(that's the language code.org uses).I not as familiar with JavaScript so could someone please help me out.

the link to the code is attached below

https://studio.code.org/projects/applab/dzSu8DgHanrKs5xFgdwEGr_zrX7laATlGNECBzlKMug