FOOTSTEP_SFX = [
  # Start
  ['step_wood',
   'step_tile'],
  # Blue
  ['step_gravel',
   'step_wood'],
  # Blue Interior
  ['step_tile',
   'step_wood',
   'step_metal'],
  # Green
  ['step_grass',
   'step_wood',
   'step_gravel',
   'step_boat'],
  # Green Interior
  ['step_grass',
   'step_tile'],
  # Red
  ['step_grate',
   'step_metal'],
  # Red Interior
  ['step_tile',
   'step_wood'],
  # Tower
  ['step_splash'],
  # Tower Start
  [],
  # Blank
  ['step_tile'],
  # Blue Factory Interior
  [['step_metal', 0.5]],
  # Red Ground
  ['step_tile',
   'step_wood'],
  # Red Factory
  ['step_tile',
   'step_wood',
   'step_grate'],
  # Red Factory Interior
  ['step_metal'],
  # Red observation deck
  ['step_metal',
   'step_tile'],
  # Red alley
  ['step_tile',
   'step_wood',
   'step_grate'],
  # Blue outpost
  ['step_tile',
   'step_wood'],
  # Blue mineshaft
  ['step_gravel',
   'step_wood'],
  # Tower
  ['step_splash',
  'step_tile_soft'],
  # Start Tower
  ['step_wood',
   'step_tile'],
  # Start line
  [],
  # Green mineshaft
  ['step_gravel',
   'step_wood'],
  # Green interior boat
  ['step_gravel',
   'step_wood',
   'step_boat'],
]

FOOTSTEP_AMT = {
  'step_metal' => 4,
  'step_tile' => 4,
  'step_tile_soft' => 4
}