$spacer: 0.5rem;
$spacers: (
  0: 0,
  1: ($spacer * .25),
  2: ($spacer * .5),
  3: $spacer,
  4: ($spacer * 2),
  5: ($spacer * 3),
  6: ($spacer * 4),
  7: ($spacer * 5),
  8: ($spacer * 6),
  9: ($spacer * 7),
  10: ($spacer * 8),
);