Lab 5 - if, elif, and else

What Does It Draw?

left-right

from byubit import Bit

@Bit.run('left-right')
def go(bit):
    while bit.front_clear():
        bit.move()
        if not bit.left_clear():
            bit.paint("blue")
        elif not bit.right_clear():
            bit.paint("green")
        else:
            bit.paint("red")

Result

go-left

from byubit import Bit

@Bit.run('go-left')
def go(bit):
    while bit.front_clear():
        bit.move()
        
        if not bit.right_clear():
            bit.left()
        
        if bit.is_green():
            bit.paint('blue')
        else:
            bit.paint('green')

Result

add-color

from byubit import Bit

@Bit.run('add-color')
def go(bit):
    bit.paint('blue')
            
    while bit.front_clear():
        bit.move()
        if bit.is_empty():
            bit.paint('blue')

Result

Activities

invert.py

Invert blue squares to empty and empty squares to blue.

Bit Fact: You can erase the color in a square using bit.erase()

invert_carefully.py

Rules

• Blue => empty
• Empty => blue
• Anything else => leave it alone

Hint: You can have if and elif with no else block.

wander.py

Bit is restless and wants to go for a walk.

Rules

• Bit moves until it’s blocked in front
• Bit turns left when encountering a green square
• Bit turns right when encountering a blue square
• Bit paints empty squares red

fix_reds.py

Turn any red square AFTER the green square into a blue square.

waterfall.py

Bit is a rushing river!

The water always moves forward, but if there is no ground beneath, it drops!

paint_the_box.py

Paint the walls of the room green.

Grading