a command that:

  • sets all the code-defined (not slider defined) global variables to zero
  • clears the tick counter (leaving it with no value, not zero)
  • kills all the turtles
  • resets all the patch variables (including color) to their defaults
  • clears all the all lines and stamps drawn by turtles
  • clears every plot
  • clears the text from the model output area (if applicable)