playing_with_blocks_exercises.md

Exercises Accompanying the "Playing with Blocks" Notebook

Exercise 1

Make a 5x5 BlockGrid with your favorite color (from the "Colors" notebook) and assign it to a variable called grid.

Exercise 2

Change the color of the block in the third row and fourth column.

Exercise 3

Change the color of the block in the lower-right corner of the grid.

Exercise 4

Use negative indexing to change the color of the block in the second row and first column.

Exercise 5

Use a for loop to change the color of every block in your grid.

Exercise 6

Use a for loop and an if statement to change the color of every block in the fourth column of your grid.

Exercise 7

Augment your code from Exercise 6 with an elif and an else to change the color of all blocks in your grid. But make the second column red, the third column green, and all the other blocks gold.

Exercise 8

Use an if with an or to change the color of the blocks in the first and fifth rows to black.

Exercise 9

Use an if with an and condition to turn every block that is in the fourth column AND black to blue.

Exercise 10

Make a new 20 by 20 block grid. Use a for loop with range to change the color of every block in the third, 10th, and 18th rows.

Exercise 11

Use nested for loops with range to change the color of the bottom-left quadrant of your 20 by 20 grid.

Exercise 12

Try to get the same affects as in Exercises 10 & 11, but using slicing instead of for loops.

Exercise 13

Write a function that takes a grid as input and returns a new grid with the colors inverted (e.g. white becomes black, black becomes white, yellow becomes ???).

Exercise 14

Write a function that takes a grid and a color as input returns a new grid that is the input grid with an added border of the given color.

BONUS: Make the color input argument optional.

Exercise 15

Write a function that can follow a list of directions ('up', 'down', 'left', 'right') along a path, changing the color of blocks as it goes. An example function definition:

def path_color(grid, path, starting_point, color):
    ...