save project

my_tree.py

+import turtle
+import random
+def tree(n):
+    if n>=0:
+      if n<=12:
+         colour_list=['snow','lightcoral']
+         colour=random.choice(colour_list)
+         pen.colour(colour)
+         pen.pensize(n/3)
+      else:
+         pen.colour('sienna')
+         pen.pensize(n/10)
+      pen.forward(n)
+      angle=random.random()
+      pen.right(30*andom)
+      length=1.5*random.random()
+      tree(n-10*length)
+      pen.left(60*length)
+      tree(n-10*length)
+      pen.right(30*length)
+      pen.up()
+      pen.backward(n)
+      pen.down()
+pen = turtle.Turtle()
+pen.color('sienna')
+# 画布大小
+w = turtle.Screen()
+w.bgcolor('wheat')      # wheat小麦
+
+# 移动到起点
+pen.left(60)
+   # 后退
+pen.down()
+
+
+
+
+
+
+tree(60)
+turtle.done()
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