title: HighChart JavaSCript two spline updating in the same graphic
body: <p>I have one spline updating each minute. What I need to do is to put another spline with different color into the same graphic. </p>
  
  <p>So I just copied the same JavaScript code again, it works fine with a different color but it overwrites the first one. Of course it's to be expected but I don't know what to change to visualize two spline at the same time.</p>
  
  <p>I'm new to JavaScript, so thanks in advance..!</p>