save project

my_tree.py

 import turtle
 import turtle
+import random
+
+
 
 
 pen = turtle.Turtle()
 pen = turtle.Turtle()
 pen.color('blue')
 pen.color('blue')
+pen.speed(0)
 # 画布大小
 # 画布大小
 w = turtle.Screen()
 w = turtle.Screen()
-w.bgcolor('yellow')      # wheat小麦
+w.bgcolor('yellow') 
+
 
 
 # 移动到起点
 # 移动到起点
-pen.left(100)
+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(colr_list)
+            pen.clone(clone)
+            pen.pensize(n / 3)
+            pen.clone('red')
+            pen.pensize(n / 10)
         pen.forward(n)
         pen.forward(n)
-        pen.right(30)
-        tree(n-50)
-        pen.left(60)
-        tree(n-50)
-        pen.right(30)
+        angle = random.random()
+        pen.right(30*angle)
+        length = 1.5*random.random()
+        tree(n-10*length)
+        pen.left(60*angle)
+        tree(n-10*length)
+        pen.right(30*angle)
         pen.up()
         pen.up()
         pen.backward(n)    # 后退
         pen.backward(n)    # 后退
         pen.down()
         pen.down()
 
 
-
-
-
-
-
-tree(100)
+tree(60)
 turtle.done()
 turtle.done()