code: def smooth_hue_palette(scale):
      """Takes an array of ints and returns a corresponding colored rgb array."""
      # http://en.wikipedia.org/wiki/HSL_and_HSV#From_HSL
      # Based on http://stackoverflow.com/a/17382854 , with simplifications and
      # optimizations. Assumes S=1, L=0.5, meaning C=1 and m=0.
      # 0 stays black, everything else moves into a hue.
  
      # Some initial values and scaling. Check wikipedia for variable meanings.
      array = numpy.arange(scale)
      h = array * (6 / scale)  # range of [0,6)
      x = 255 * (1 - numpy.absolute(numpy.mod(h, 2) - 1))
      c = 255
  
      # Initialize outputs to zero/black
      out = numpy.zeros(h.shape + (3,), float)
      r = out[..., 0]
      g = out[..., 1]
      b = out[..., 2]
  
      mask = (0 < h) & (h < 1)
      r[mask] = c
      g[mask] = x[mask]
  
      mask = (1 <= h) & (h < 2)
      r[mask] = x[mask]
      g[mask] = c
  
      mask = (2 <= h) & (h < 3)
      g[mask] = c
      b[mask] = x[mask]
  
      mask = (3 <= h) & (h < 4)
      g[mask] = x[mask]
      b[mask] = c
  
      mask = (4 <= h) & (h < 5)
      r[mask] = x[mask]
      b[mask] = c
  
      mask = 5 <= h
      r[mask] = c
      b[mask] = x[mask]
  
      return out
  
imports: import collections
  import math
  import random
  import numpy
  from pysc2.lib import static_data
label_desc: Use image node_id 1 for calling a global function with example usage: smooth_hue_palette(scale) and returns: out