A Ticking Clock

Before you can animate with time, you need time.

Write new_game so the state starts with "t" at 0, and update so it adds 1 every frame. draw doesn't have to do anything interesting yet — return a blank grid.

That's it. The trace should read 1 2 3 4 5.

Small as this is, it's the foundation for the rest of the chapter: every colour you pick from here on is worked out from this one number.

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python

def new_game():

# Start the clock at 0.

return {}

def update(state, keys):

# Add one to the clock each frame.

return state

def draw(state):

return blank_grid()