Lab 6: Drawing with Functions

"""

Lab 6: Use a function to draw multiple squares. Take screen shots and store

the results from each step on your slide in the shared google slides deck.

Each implemented function is worth half a point.

See the Lab 6 Description on the course website at:

https://sites.google.com/view/bttcs111sp22/labs/lab-6-drawing-with-functions

See a summary of basic turtle commands on the course website at:

https://sites.google.com/view/bttcs111sp22/tools/turtle-graphics

Check out the official turtle graphics docs at:

https://docs.python.org/3/library/turtle.html

"""

import turtle # Do not remove this line

t = turtle.Turtle() # Do not remove this line

t.speed( 0)

# Set the starting location for drawings

x = -300

y = 300

# Move the turtle to the next drawing location by changing

# the global (shared) x,y values and moving the turtle there.

# Don't change this function.

def nextSpot( ):

global x,y # Change the shared global x,y values

t.penup()

x += 50

y -= 50

t.setposition(x, y)

t.pendown()

# --------------- Your changes should be below this line ---------------

# Draw a square using eight individual t.forward() and t.left() instructions

def square_original():

pass # Delete this line and put your code here

# Draw a square using the two t.forward() and t.left() instructions in a loop

def square_with_loop():

pass # Delete this line and put your code here

# Draw a square where the size of a side is a parameter

def square_with_size( size):

pass # Delete this line and put your code here

# Draw four squares, rotating left 90 degrees between each one

# (Hint: call the square_with_size() function you just wrote)

def rotate_four_squares( size):

pass # Delete this line and put your code here

# Draw some number of squares, rotating left some amount between each one

def rotate_some_squares( size, how_many, rotation):

pass # Delete this line and put your code here

# Draw some number of squares, rotating left some amount between each one

def rotate_squares_and_grow( size, size_increment, how_many, rotation):

pass # Delete this line and put your code here

# -------------------------- Main part of program ---------------------

# Don't change anything below this line.

t.color("black")

nextSpot( ) # Move the turtle to the next drawing position

square_original() # Draw a black square using a list of 8 instructions

t.color("blue")

nextSpot( ) # Move the turtle to the next drawing position

square_with_loop() # Draw a square, using 2 instructions in a loop

t.color("red")

nextSpot( ) # Move the turtle to the next drawing position

# Draw two squares, using a parameter for size

square_with_size( 20)

square_with_size( 40)

t.color("green")

nextSpot( ) # Move the turtle to the next drawing position

# Draw four squares of the given size, rotating left 90 degrees between them.

rotate_four_squares( 40)

t.color("dark orchid") # Color list is at tcl.tk/man/tcl8.5/TkCmd/colors.html

nextSpot( ) # Move the turtle to the next drawing position

nextSpot( ) # Move the turtle to the next drawing position

# Draw some number of squares, rotating between them.

# Send the size, number of squares, degrees to rotate left between each one

rotate_some_squares( 40, 10, 360/10)

t.color("turquoise") # Color list is at tcl.tk/man/tcl8.5/TkCmd/colors.html

nextSpot( ) # Move the turtle to the next drawing position

nextSpot( ) # Move the turtle to the next drawing position

# Draw four squares, rotating between them

# Send the size, size increment, number of squares, and the

# degrees to rotate left between each one.

rotate_squares_and_grow( 4, 4, 36, 10)