SQL & PL/SQL :: How To Get Insert Template For Any Given Table

I would like to know how to get an insert template for any given table.

For example
SQL> @insertTemplate
Enter Table Name: emp
INSERT INTO emp VALUES
(NOT NULL -- EMP_ID NUMBER(15,0)
,NOT NULL -- EMP_NAME NUMBER(15,0)
,NOT NULL -- SALARY NUMBER(15,0)
,NULL -- HIRE_DATE DATE
) ;

For any given table the script should create an insert template like above?