[params.background]
  spacing = 24        # distance between dots
  maxRadius = 10      # max dot radius
  baseOffset = 120    # baseline from bottom
  freq = 0.008        # wave frequency (lower = wider waves)
  speed = 0.01        # wave speed (lower = slower movement)

  # envelope controls (controls variance)
  baseAmp = 100
  envelope1Freq = 0.002
  envelope1Amp  = 120
  envelope2Freq = 0.0005
  envelope2Amp  = 200