difference between test scenario test case and test script code example

Example 1: 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.

Example 2: test script vs test scenario

• A test script in software testing is
a set of instructions that will be performed
on the system under test to test that the
system functions as expected.

 Scenario testing is a software testing
 technique that is based on a scenario.
 Basically It involves converting business
 requirements to test scenarios for better
 understanding and to achieve an end to end testing. 
 
 For Examle :
As  test scenario – “Verify that the user is not
able to login with incorrect credentials”.
Now, we can  brake down into test scenario 
to multiple test cases like-