save project

my_tree.py

 import turtle
-
+import random
 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)
+        angle = random.random()
+        lenth =1.5*random.random()
         pen.forward(n)
-        pen.right(30)
-        tree(n-10)
-        pen.left(60)
-        tree(n-10)
-        pen.right(30)
+        pen.right(30*angle)
+        tree(n-10*lenth)
+        pen.left(60*angle)
+        tree(n-10*lenth)
+        pen.right(30*angle)
         pen.up()
         pen.backward(n)
         pen.down()
@@ -17,11 +27,11 @@ pen.color('sienna')
 # 画布大小
 w = turtle.Screen()
 w.bgcolor('wheat')      # wheat小麦
-pen.speed(100)
+pen.speed(0)
 # 移动到起点
 pen.left(90)
 pen.up()
 pen.backward(150)
 pen.down()
-tree (100)
+tree (60)
 turtle.done()
\ No newline at end of file