<a href="#odd2">Go to the middle</a>

<section id="odd"></section>
<section></section>
<section id="odd2"></section>
<section></section>

section{
  height: 90vh;
  background: gray;
}

section#odd, #odd2{
  background:lightgray;
}

SmoothScroll({
  // Scrolling Core
  animationTime: 400, // [ms]
  stepSize: 100, // [px]

  // Acceleration
  accelerationDelta: 50, // 50
  accelerationMax: 3, // 3

  // Keyboard Settings
  keyboardSupport: true, // option
  arrowScroll: 50, // [px]

  // Pulse (less tweakable)
  // ratio of "tail" to "acceleration"
  pulseAlgorithm: true,
  pulseScale: 4,
  pulseNormalize: 1,

  // Other
  touchpadSupport: false, // ignore touchpad by default
  fixedBackground: true,
  excluded          : ''  
});