Created
December 11, 2018 04:43
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import turtle | |
window = turtle.Screen() | |
euler = turtle.Turtle() # A good mathy name for our turtle | |
euler.shape("turtle") | |
current = 0 # Here's how we know where we are | |
seen = set() # Here's where we'll keep track of where we've been | |
# Step increases by 1 each time | |
for step_size in range(1, 100): | |
backwards = current - step_size | |
# Step backwards if its positive and we've never been there before | |
if backwards > 0 and backwards not in seen: | |
euler.setheading(90) # 90 degrees is pointing straight up | |
euler.circle(step_size/2, 180) # 180 degrees means "draw a semicircle" | |
current = backwards | |
seen.add(current) | |
# Otherwise, go forwards | |
else: | |
euler.setheading(270) # 270 degrees is straight down | |
euler.circle(step_size/2, 180) | |
current += step_size | |
seen.add(current) | |
turtle.done() |
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