Extra Credit  Assignment:

• This is not a normal homework, is not required in any way and doing this assignment cannot have any negative impact on your grade.
• Doing this assignment could help boost your overall grade. It can increase your homework average (which represents 25% of your grade). While all other components of the grade can be at most an A. Due to this assignment, it is possible to boost your homework grade as high as A+ (4.3). In short, this could be a way of making up for lower than expected midterm grades.

• Please Submit Only 1 Extra Credit Assignment.  Only 1 extra credit assignment will count no matter what.
  
• There are 2 choices, each involves modifying an existing program that deals with random numbers and sequences.
• Extra Credit A involves extending the random turtle drawing program
• Extra Credit B involves extending the random sentence creation program
• The initial versions of both these programs are online connected with the Collections talk (approximately classes 20-22). They are described in slides 14 to 18.
• You should change the program in noticeable ways.
  

1. Is the program clearly written and organized?
2. Does it work?
3. Is there anything clever, amusing or entertaining?
   
4. After your changes, are the results of the program noticably different than the original program.
   

1. Modify the Turtle program written in the class.
   
2. Randomly generate similar lists consisting of:
•  combinations of 'square', 'triangle', 'circle' and 'left'
• And random numbers from 1 to 10 for physical dimensions and 10 to 90 for angles
• Have the program use 'split' to divide the numbers from the commands so that the turtles can have more variety in their random creations
3. . Add some fun stuff. These are examples, but do what you want (don't go too wild):
• Variety of Shapes, Colors, etc.
• Weights, so some actions are more likely than others
• You could record “addresses” in a dictionary (address_book) indicating where certain shapes are. The x,y coordinates of each turtle position is returned by turtle.pos(). You could then have a separate function which causes the turtle to go to the location of a particular shape by looking it up in the address_book, e.g., go_to_shape(blue_triangle) would cause the turtle to go to the last blue triangle that it drew..
•  Incorporate your stick figure functions from the previous turtle assignment

1. Fix the grammar in small ways. Examples:
• If 'a' comes before a single noun that begins with a vowel, use 'an' instead.
• Intransitive verbs (laugh, rose, etc.) should occur without a following noun group. Change the program to allow for this (make a separate word list)
2. Complicate the grammar. For example, add a Prepositional Phrase (or something else):
• Consists of a preposition (of, in, on, about, for, to, …) + a Noun Group
• It can occur: after the noun in a noun group or at the end of a verb group
3. Adapt the Program for Some Purpose. Possibilities include:
• Add words associated with a particular domain, e.g., the subject (first noun group) could optionally be taken from a random list of names of famous people.
• You can add verbs/adjectives from a particular semantic domain: biology, sports, food, romance (the current words were chosen based on frequency)
• Remove words that conflict with your purpose
4. Etc.