title: how to do dual circular slider (clock like function)
body: <p>i will like to know how to do a dual slider in the attached image.</p>
  
  <p>i am looking at this codes to modified it. i will like to know how to have 2 slider to allow user to choose the desired time.</p>
  
  <p>The problem i encounter are how do i have 2 slider to show something like the image?</p>
  
  <p><a href="http://www.cocoacontrols.com/controls/tb_circularslider" rel="nofollow noreferrer">http://www.cocoacontrols.com/controls/tb_circularslider</a></p>
  
  <p>any comment are greatly appreciated here.</p>
  
  <p><img src="https://i.stack.imgur.com/OiwSk.png" alt="enter image description here"></p>