Lab 2b — Conditions

Preparation

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

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

7 by 6 world where all the border squares are black, bit in the top left beneath the black squares

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

green squares within the black squares, forming a smaller box, bit in the top left on a green square

The second world looks like this:

5 by 5 empty world, bit starting at the bottom right facing up

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

green squares around the border of the world, bit ending at the bottom right facing up

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 — when does Bit stop painting?
This problem does not use and or or.

Questions to think about:

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

Red Roses

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

a world with random red, blue, and green squares, all in the same row as bit starting on the left

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

all of the blue and green squares turned to red, bit ending on the right

You have starter code in red-roses.py.

Notes:

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

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

Clear green

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:

bit starting on the left in the middle row, with green squares in the row. Some green squares have black squares above, some green squares have black squares below, and some have no black squares next to them

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

All of the green squares next to black squares have been painted white, bit ending on the right

Notes:

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

Remember, use bit.paint('white') to erase a square.

Questions to consider:

Did you use two ifs or one if and one elif?
Is there any difference?

Grading

To finish this lab and receive a grade, upload a screenshot of your code to Canvas. See Lab 2b in Canvas for additional instructions.

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