save project

my_tree.py

+import turtle
+from random import choice,randint,random
+
+def tree(n):
+    print(n)
+    if n>=0:
+        if n<=12:
+            pen.pencolor(choice(['snow','snow','lightcoral']))
+            pen.pensize(n/3)
+        else:
+            pen.pencolor('sienna')
+            pen.pensize(n/14)
+        angle=random()
+        length=1.5*random()
+        pen.forward(n)
+        pen.right(30*angle)
+        tree(n-10*length)
+        pen.left(60*angle)
+        tree(n-10*length)
+        pen.right(30*angle)
+        pen.up()
+        pen.backward(n)
+        pen.down()
+    #if n<=12:
+        #画笔颜色改
+        #
+
+pen = turtle.Turtle()
+pen.color('sienna')
+# 画布大小
+w = turtle.Screen()
+w.bgcolor('wheat')      # wheat小麦
+n=70
+
+# 移动到起点
+pen.speed(100000)
+pen.left(90)
+pen.up()
+pen.backward(200)    # 后退
+pen.down()
+tree(n)
+#while True:
+
+turtle.done()