save project

my_tree.py

 import turtle
-
+import random
 pen = turtle.Turtle()
 pen.color('sienna')
 pen.speed(99999)
@@ -7,13 +7,21 @@ pen.speed(99999)
 w = turtle.Screen()
 w.bgcolor('wheat')      # wheat小麦
 def tree(n):
-    if n>=50:
+    if n<=12:
+        pen.color(random.choices(['snow','lightcoral']))
+        pen.pensize(n/3)
+    else:
+        pen.pensize(n/10)
+        pen.pencolor('sienna')
+    if n>=0:
+        l=random.randint(1,15)
         pen.forward(n)
-        pen.right(30)
-        tree(n-10)
-        pen.left(60)
-        tree(n-10)
-        pen.right(30)
+        angle=random.randint(0,30)
+        pen.right(angle)
+        tree(n-l)
+        pen.left(2*angle)
+        tree(n-l)
+        pen.right(angle)
         pen.up()
         pen.backward(n)
         pen.down()
@@ -33,6 +41,6 @@ pen.down()
     pen.right(30)
     pen.backward(100)
 '''
-tree(90)
+tree(50)
 
 turtle.done()