title: how to make scrollable button in android
body: <p>Hello i'm trying to make an equalizer for my app but i can't figure out how to make the buttons. I don't really know how to explain myself so here is a picture that reveals more than my words: 
  <img src="https://i.stack.imgur.com/FRyht.jpg" alt="enter image description here"></p>
  
  <p>Do i need animations? Can you guys point me in the right direction?</p>
  
  <p>Thanks in advance.</p>