What you need

• A simple state machine for the ant

  • 3 outputs
    • Go forward
    • Turn left
    • Turn right

• Two 7-bit counters to hold X and Y

  • With preload, increment, decrement

• 4-bit shift register to hold the ant’s heading

  • Rotate right when ant turns right
  • Rotate left when ant turns left

• A memory controller

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