save project

my_tree.py

 import turtle
 import turtle
-
+import random
 pen = turtle.Turtle()
 pen = turtle.Turtle()
 pen.color('sienna')
 pen.color('sienna')
+turtle.tracer(False)
 # 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
@@ -18,18 +19,27 @@ pen.down()
 # pen.backward(50)
 # pen.backward(50)
 # pen.left(60)
 # pen.left(60)
 # pen.fd(50)
 # pen.fd(50)
-
+pen.speed(0)
 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.fd(n)
         pen.fd(n)
-        pen.right(30)
-        tree(n-50)
-        pen.left(60)
-        tree(n-50)
-        pen.right(30)
+        a = random.randint(0,30)
+        l = random.randint(1,15)
+        pen.right(a)
+        tree(n-l)
+        pen.left(2*a)
+        tree(n-l)
+        pen.right(a)
         pen.up()
         pen.up()
         pen.backward(n)
         pen.backward(n)
         pen.down()
         pen.down()
-        
-tree(100)
+tree(60)
 turtle.done()
 turtle.done()