save project

my_tree.py

 import turtle
 import turtle
+import random
+c=['snow','pink','red','orange','purple']
 def tree(n):
 def tree(n):
-    if n>=50:
+    if n>=10:
+        if n==10 or n==20:
+            pen.color(random.choice(c))
+            pen.pensize(3)
+        else:
+            pen.color('sienna')
+            pen.pensize(n/10)
+        pen.pensize(n/10)
         pen.forward(n)
         pen.forward(n)
-        pen.right(30)
+        an=random.randint(10,37)
+        pen.right(an)
         tree(n-10)
         tree(n-10)
-        pen.left(60)
+        pen.left(2*an)
         tree(n-10)
         tree(n-10)
-        pen.right(30)
+        pen.right(an)
         pen.up()
         pen.up()
         pen.backward(n)
         pen.backward(n)
         pen.down()
         pen.down()
 
 
 pen = turtle.Turtle()
 pen = turtle.Turtle()
-pen.color('light blue')
+pen.color('sienna')
 # 画布大小
 # 画布大小
 w = turtle.Screen()
 w = turtle.Screen()
-w.bgcolor('black')      # wheat小麦
+w.bgcolor('wheat')      # wheat小麦
 
 
 # 移动到起点
 # 移动到起点
 pen.left(90)
 pen.left(90)