Well as another here has pointed out this is licensed under the MIT license on codepen and explicitly for this at [0] then click "license" below the pen
It doesn't matter what you say here, the license is kind of final for the code it's referencing.
IIRC CodePen does allow you to license your code differently, but it requires a "pro" account.
Judging by the fact you said you won't use it, you seem to have a working moral compass - unfortunately you are a minority.