Falling

Now drop something.

update adds 1 to state["y"] each frame
draw paints a blue square at row state["y"], column 20

Notice what changed from the last exercise: the moving number is now the first index instead of the second. That is the entire difference between sideways and downwards.

Bigger y means further down, because row 0 is the top of the picture. This trips up nearly everyone once.

Expected output

1 2 3 4 5

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python

def update(state, keys):

# Add 1 to state["y"] so the dot moves down.

return state

def draw(state):

grid = blank_grid()

# Paint a blue square at row state["y"], column 20.

return grid