To start this assignment, download this zip file.

The following guide pages cover material needed for this assignment:

# Lab 2b β Conditions

## Preparation

Reminder, you should work in teams of 2 or 3 when solving the lab problems. Learning to code together is an important part of this class.

### 1 minute

Download the zip file for this lab, located above. This zip file has worlds that
you will use for Bit. Extract the files and put them in your `cs110`

directory
in a folder called `lab2b`

.

## Paint the box

### 10 minutes

Bitβs job is to paint a green box. There are two worlds. The first world starts like this:

After Bit paints a green box, it looks like this:

The second world looks like this:

After Bit paints a green box, it looks like this:

You have starter code in `paint-the-box.py`

.

Notes:

- Your code needs to be general enough to solve both worlds.
- Notice that Bit ends where it starts, facing the same direction.
- Think about the stopping condition β when does Bit stop painting?
- This problem does
*not*use`and`

or`or`

.

Discuss with the TA:

- What was your stopping condition?
- What other conditions did you need?

## Red Roses

### 15 minutes

In this problem, Bit needs to turn all of the roses red. Here is one of the worlds:

At the end, Bit should have turned all of the blue and green squares into red ones:

You have starter code in `red-roses.py`

.

Notes:

- What is the stopping condition?
- What other conditions do you need?

Discuss with the TA:

- Compare your solution on this problem to the solution on the previous problem.

## Clear green

### 15 minutes

In this problem, Bit needs to clear only the green squares that are next to the black squares. One of the worlds looks like this:

At the end, Bit should have cleared all of the green squares that are next to a black square:

Notes:

- What is the stopping condition?
- What conditions can Bit use to decide whether to erase a square?

Remember, use `bit.erase()`

to erase a square.

Discuss with the TA:

- Did you use two
`if`

s or one`if`

and one`elif`

? - Is there any difference?

## Wrapup

### 5 minutes

Discuss any questions about conditions in while loops and if statements.

## Grading

To finish this lab and receive a grade, take the canvas quiz.

We are providing a solution so you can check your work. Please look at this after you complete the assignment. π