Activities/Turtle Art/Tutorials/Turtle Art Code for Turing Machine

Turtle Art Code for Turtle Art Turing Machine

In progress.

• The Start action is the main procedure

• The Setup action defines and initializes variables, and sets the orientation of the turtle

• The Tape action writes the initial tape. User can change values in repeat statements to change arguments.

• The Program action followed by the stack1 action writes the program table line by line. This is divided in two so that the segments fit in the Turtle Art workspace

• The Execute action carries out the next program step until the halt state is reached

• The ToTape action Move turtle to current cell on tape

• The ToProgram action Move Turtle to beginning of current program row to execute

• The WriteCell action Write current color to current cell, and move to next cell

• The WriteSymbol action Write current color in cell without moving

• The ReadPixel action Read RGB values of pixel to stack, pop to variables

• The SetValue action Find value of cell symbol from RGB numbers

• The SetMove action Read next Move direction from program table

• The SetSymbol action Read next Symbol to write from program table

• The SetState action Read next State from program table

• The NewCell action Move left or right and set cell number of new location

• The Log action Write Step number, Symbol, Move, State, Cell number on new log line in black, saving and restoring