How to create the APPLICATION....can anyone please suggest me..!

Login: 

1.( With basic Sign-up functionality)         

2.To Do Viewer         

3.Create To DO Popup    

User Journey :            

1.After Successful login user will be navigated to To Do view screen         

2.On that page there will be a provision for creating a new to-do item         

3.If there is no to-do item present, then page will show a message “No Items Available”         

4.To-Do items will be grouped by active, overdue (completion date is already over) and future and resolved. 

Each group will further grouped by priority :       

    There will be separate color coding for 3 types,                   

    1.Past will be Red and Bold             

    2.Present is Orange             

    3.Future will be green with italics   

   4.Resolved will be Green with green tick icon beside them, and text will the strike-through

Each to do line item will provide options for removing and resolving the item 

                    1.If deleted, then that item will be removed from database and the view as well             

                    2.If resolved then item will come under resolved section             

                    3.Please note: Future items can not be resolved but they can be removed   

Create To Do: A small popup will open by clicking on the button on the main page. This popup will contain                     

          1.To-Do Name (Max 100 characters, Min 10 characters, has to be alpha numeric)             

           2.Priority (Dropdown – High, Medium, Low)             

           3.Resolution date (Validation: Only current or future dates)             

           4.Button for Save & Cancel. Save button will be disabled if there is/are any validation error                             

Non-Functional Requirements : 

          1. Application must be responsive         

          2.Application must be modular. Create OutSystems blocks to compose the screens         

          3.Proper exception handling is required. Need to implement a global and local exception handling mechanism         

         4.Database calls should not be invoked directly from UI. It should route through a separate module