All of Them Fall

Now move every drop down by one, every frame.

The test prints the whole list each frame, so you'll see [1, 4, 7], then [2, 5, 8] — all three numbers climbing together.

Careful with this one:

for drop in state["drops"]:
    drop = drop + 1

That runs without error and does nothing. drop is a copy. Change the list by its index instead, and the drops will actually move.

Expected output

[1, 4, 7] [2, 5, 8] [3, 6, 9]

Need a hint?

3 available · costs 5 XP each

python

def new_game():

return {"drops": [0, 3, 6]}

def update(state, keys):

for drop in state["drops"]:

drop = drop + 1 # this changes a copy — fix it

return state

def draw(state):

grid = blank_grid()

for i in range(len(state["drops"])):

grid[state["drops"][i]][8 + i * 10] = "aqua"

return grid