title: Unity Shader Graph: How to speed up time from Time node?
body: <p>I'm trying to use Sine Time output from Time node but I want it to be faster.</p>
  
  <p>If this is done in a Unity c#, I would try to something like this</p>
  
  <pre><code>totalTime += Time.deltaTime * speed;
  
  value = Mathf.PingPong(totalTime, 1);
  </code></pre>
  
  <p>but I can't do this in Shader Graph. How to solve this problem?</p>
  
  <p>EDIT1: I also try to create custom node fuction but this will result in error. </p>
  
  <pre><code>static string PingPongFunction(
      [Slot(0, Binding.None)] Vector1 t,
      [Slot(1, Binding.None)] Vector1 length,
      [Slot(2, Binding.None)] out Vector1 Out)
  {
      return
          @"
              {
                  Out = Mathf.PingPong(t, length);
              }
          ";
  }
  </code></pre>