Referenced from lesson Defining Values (Spring, 2021)
1 What image do you see repeated in the flag?
2 Highlight or circle all instances of the structure that makes the repeated image in the code below.
3 In the code below, highlight or circle all instances of the expression for that image.
4 Write the code to define a value for the repeated expression.
5 Open the
Chinese flag starter file (Pyret)
and click Run.
Then type china into the interactions area and click Enter.
6 Save a copy of the file, and simplify the flag code using the value you defined. Click Run, and confirm that you still get the same image as the original.
7 Now change the color of all of the stars to black, in both files. Then change the size of the stars.
8 Why is it helpful to define values for repeated images?
Challenge:
-
This file uses a function we haven’t seen before! What is it?
-
Can you figure out its contract? Hint: Focus on the last instance of the function.
These materials were developed partly through support of the National Science Foundation,
(awards 1042210, 1535276, 1648684, and 1738598). 
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