code: def render(self, mode="human", close=False):
      observation = np.zeros((20, 20 * self.bit_length, 3))
      for bit_idx, (state_bit, goal_bit) in enumerate(
          zip(self.state, self.goal)
      ):
          # green if the bit matches
          observation[:, bit_idx * 20 : (bit_idx + 1) * 20, 1] = (
              state_bit == goal_bit
          ) * 255
          # red if the bit doesn't match
          observation[:, bit_idx * 20 : (bit_idx + 1) * 20, 0] = (
              state_bit != goal_bit
          ) * 255
      return observation
  
file_path: coach/rl_coach/environments/toy_problems/bit_flip.py
imports: import random
  import gym
  import numpy
  from gym import spaces
label_desc: Use image node_id 8 for calling the BitFlip obj's underlying member method code with example usage: obj.render(mode, close) and returns: observation