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@@ -0,0 +1,74 @@
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+import turtle
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+import random
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+from turtle import *
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+from time import sleep
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+
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+t = turtle.Turtle()
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+w = turtle.Screen()
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+
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+
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+def tree(branchLen, t):
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+ if branchLen > 3:
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+ if 8 <= branchLen <= 12:
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+ if random.randint(0, 2) == 0:
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+ t.color('snow')
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+ else:
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+ t.color('lightcoral')
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+ t.pensize(branchLen / 3)
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+ elif branchLen < 8:
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+ if random.randint(0, 1) == 0:
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+ t.color('snow')
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+ else:
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+ t.color('lightcoral')
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+ t.pensize(branchLen / 2)
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+ else:
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+ t.color('sienna')
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+ t.pensize(branchLen / 10)
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+
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+ t.forward(branchLen)
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+ a = 1.5 * random.random()
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+ t.right(20 * a)
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+ b = 1.5 * random.random()
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+ tree(branchLen - 10 * b, t)
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+ t.left(40 * a)
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+ tree(branchLen - 10 * b, t)
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+ t.right(20 * a)
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+ t.up()
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+ t.backward(branchLen)
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+ t.down()
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+
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+
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+def petal(m, t): # 树下花瓣
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+ for i in range(m):
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+ a = 200 - 400 * random.random()
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+ b = 10 - 20 * random.random()
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+ t.up()
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+ t.forward(b)
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+ t.left(90)
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+ t.forward(a)
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+ t.down()
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+ t.color("lightcoral")
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+ t.circle(1)
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+ t.up()
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+ t.backward(a)
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+ t.right(90)
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+ t.backward(b)
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+
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+
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+def main():
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+ t = turtle.Turtle()
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+ myWin = turtle.Screen()
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+ # getscreen().tracer(5, 0)
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+ turtle.screensize(bg='wheat')
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+ t.left(90)
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+ t.up()
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+ t.backward(150)
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+ t.down()
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+ t.color('sienna')
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+ tree(60, t)
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+ petal(100, t)
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+
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+ myWin.exitonclick()
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+
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+
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+main()
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