Change the state of button when another button is pressed

Hi all, 

I have a pretty straightforward question but just cant figure out how I can achieve it...I am trying to switch between two types of waveforms (sine and square) on a graph using buttons and a case structure.

I currently have two buttons A and B. When I press A, it turns true and displays waveform 1. When I press B, B turns true and displays waveform 2. However when B is true, I have A still enabled as true (pressed)

I cant figure out how to change the state of A back to false when B is pressed and vice versa.

I am fairly new at Labview so if someone can refer to a post where its this is already answered or point to the right direction, that would be appreciated

Thanks