save project

diy1.py

 import turtle
 import random
+
 def tree(n):
     if n>=0:
-        pen.pensize(n/10)
+        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.randint(0,30)
-        length = random.randint(1,15)
-        pen.right(angle)
-        tree(n-length)
-        pen.left(2*angle)
-        tree(n-length)
-        pen.right(angle)
+        angle = random.random()
+        length = 1.5*random.random()
+        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()
-
 pen = turtle.Turtle()
 pen.color('sienna')
 # 画布大小