Answer:

Since the program has been nicely divided into steps and sub-steps, it is easy to see where the COLOR statements can be added. The completed program is given below.

Finished Colorful Program

colorful picture
' House Picture
'

' Start Graphics

SCREEN 12

' Draw the House 
COLOR 7 ' White

'   Draw the Walls 
LINE (150, 320)-(150, 200)
LINE (320, 320)-(320, 200)

'   Draw the Floor and Ceiling
LINE (150, 320)-(320, 320)
LINE (150, 200)-(320, 200)

'   Draw the Roof 
LINE (150, 200)-(235, 100)
LINE (320, 200)-(235, 100)

' Draw the Tree 

'   Draw the Trunk 
COLOR 6   ' Brown
LINE (510, 400)-(510, 240)
LINE (540, 400)-(540, 240)

'   Draw the Leaves 
COLOR 2    ' Green
CIRCLE (525, 160), 80

' Draw the Grass
COLOR 2    ' Green
LINE (0, 300)-(150, 280)
LINE (320, 280)-(510, 290)
LINE (540, 295)-(640, 300)
END
Not all of these COLOR statements are needed: for example, the pen color starts out white, so the first COLOR 7 does nothing. But it is helpful to have a COLOR statement for each object so it is clear what color the object will be.

QUESTION 22:

If several people were working on this program, how would you divide up the work?