up({

  // bottom position
  bottom: '1rem',
  // right position
  right: '1rem',
  // width
  width: '2.5rem',
  // height
  height: '2.5rem',
  // background color
  bg: 'hsl(213, 98%, 51%)',
  // custom icon
  src: '/assets/cursor/chevron-up-solid.svg',
  // distance from the top to show the back to top button
  whenShow: 400,
  // circular button?
  circle: true

})