save project

my_tree.py

 import turtle
 import turtle
-
+import random
 pen = turtle.Turtle()
 pen = turtle.Turtle()
 pen.color('sienna')
 pen.color('sienna')
 # 画布大小
 # 画布大小
 w = turtle.Screen()
 w = turtle.Screen()
 w.bgcolor('wheat')      # wheat小麦
 w.bgcolor('wheat')      # wheat小麦
-
+pen.speed(99999999999999999999999999999999999999999999999999999999999999999999999999)
 # 移动到起点
 # 移动到起点
 pen.left(90)
 pen.left(90)
 pen.up()
 pen.up()
 pen.backward(150)    # 后退
 pen.backward(150)    # 后退
 pen.down()
 pen.down()
 def tree(n):
 def tree(n):
-    if n>=50:
+    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)
         pen.forward(n)
-        pen.right(30)
+        pen.right(angle)
         tree(n-10)
         tree(n-10)
         pen.left(60)
         pen.left(60)
         tree(n-10)
         tree(n-10)
@@ -22,5 +30,5 @@ def tree(n):
         pen.up
         pen.up
         pen.backward(n)
         pen.backward(n)
         pen.down()
         pen.down()
-tree(100)
+tree(60)
 turtle.done()
 turtle.done()