difference between test case and test scenario code example

Example: test case vs test scenario

-Scenario is high level descripton of
what are we going to test. 
-Test case is step by step off the test.
For example 
Test scenario is
Login to the application with valid credentials
Test Case is 
Login as a seller
Given valid credentials for a moderator role
When I enter user name and password
And I click login button etc    
Test scenario can have multiple test cases.