How to make powerup add seconds to countdown

Unity Engine
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2

If you post a code snippet, ALWAYS USE CODE TAGS:

How to use code tags: https://discussions.unity.com/t/481379

How to report your problem productively in the Unity3D forums:

http://plbm.com/?p=220

Since such a thing would NEVER just be code (might only be 10% code, the rest of it scene setup and assets), it’s probably best to start by googling for some tutorials, such as:

unity pickup powerup

and

unity timer countdown

And just combine your learnings from those two things to do what you need.