Create a widget to automatically making APIs and display scrollable images for any website

We provide social posts for our clients. We need a javascript widget so that once our client embed a code snippet into their webpage, we can automatically populating social posts(images) to their website. You must have done similar web widget before using native javascript. For example, [login to view URL] 's integration code looks like this: <script> [login to view URL] = { app_id: 'APP_ID', name: "Jane Doe", // Full name email: "", // Email address created_at: 1312182000 // Signup date as a Unix timestamp }; </script> <script>(function(){var w=window;var ic=[login to view URL];if(typeof ic==="function"){ic('reattach_activator');ic('update',intercomSettings);}else{var d=document;var i=function(){i.c(arguments)};i.q=[];i.c=function(args){[login to view URL](args)};w.Intercom=i;function l(){var s=[login to view URL]('script');s.type='text/javascript';s.async=true;s.src='[login to view URL]';var x=[login to view URL]('script')[0];[login to view URL](s,x);}if([login to view URL]){[login to view URL]('onload',l);}else{[login to view URL]('load',l,false);}}})()</script> and it automatically populate a widget on any site.(checkout the bubble on the right corner of [login to view URL]) For our widget,our client need to provide a APP_ID, an option to define the loaded images layout (e.g. masanory, grid), html container etc. The image list should be responsive, adapting to different screen size including mobile.