Help! Learning CSS and came across a problem I think is really easy to correct, but I don't know how!

I have this button in my bootstrap css, under the class name .btn

I wanted to create 2 buttons, and wanted to make one of them yellow and the other the default color of btn.

HOW DO I DO THIS?? If I use the class btn for both, they are the same color. If I copy and paste the btn class, rename it btn2 and use that, the text (these buttons are links) is underlined.

How do I change class variables in a situational manner> (ie. change the class variable, but only when I call it to do so)

Epic visual tool

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