from ipythonblocks import BlockGrid
grid = BlockGrid(10, 10, fill=(123, 234, 123))

grid

WHITE = (255, 255, 255)
RED = (255, 0, 0)
GREEN = (0, 255, 0)
BLUE = (0, 0, 255)

grid[5, 5] = WHITE
grid



grid = BlockGrid(10, 10, fill=(123, 234, 123))
for i in range(10):
    grid[i, i] = WHITE

grid



# you can nest for loops
for i in range(10):
    for j in range(10):
        grid[i, j] = GREEN
        
grid

# if statements
for i in range(10):
    for j in range(10):
        if i == j - 1:
            grid[i, j] = RED

grid