save project

my_tree.py

+import turtle
+import random
+
+pen=turtle.Pen()
+pen.color("sienna")
+pen.speed(0)
+
+w = turtle.Screen()
+w.bgcolor('wheat')      # wheat小麦
+
+pen.left(90)
+pen.up()
+pen.backward(150)
+pen.down()
+
+def tree(n):
+   if n >= 0:
+        if n <= 12:
+            color_list=["snow","lightcoral"]
+            color = random.choice(color_list)
+            pen.color(color)
+            pen.pensize(n/3)
+        else:
+            pen.color("sienna")
+            pen.pensize(n/10)
+        pen.forward(n)
+        angle = random.random()
+        pen.right(30*angle)
+        length = 1.5*random.random()
+        tree(n-10*length)
+        pen.left(60*angle)
+        tree(n-10*length)
+        pen.right(30*angle)
+        pen.up()
+        pen.backward(n)
+        pen.down()
+
+tree(60)
+turtle.done()
+# pen=turtle.Turtle()
+# pen.color('sienna')
+
+# w=turtle.Screen()
+# w.bgcolor('wheat') 
+
+# pen.left(90)
+# pen.up()
+# pen.backward(150)    #后退
+# pen.down()
+
+# tree(60)
+# turtle.done()
+
+# 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(90)
+# pen.up()
+# pen.backward(150)    # 后退
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