save project

my_tree.py

 import turtle
 import random
 
-def tree(n):
-    if n>=0:
-        pen.fd(n)
-        pen.right(30)
-        tree(n-10)
-        pen.left(60)
-        tree(n-10)
-        pen.right(30)
-        pen.up()
-        pen.backward(n)
-        pen.down()
+
 pen = turtle.Turtle()
 pen.color('sienna')
 # 画布大小
@@ -23,5 +13,25 @@ pen.left(90)
 pen.up()
 pen.backward(150)    # 后退
 pen.down()
-
+def tree(n):
+    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)
+            angle = random.random()
+            pen.right(30*angle)
+            length = 1.5*random.random()
+            tree(n-10*lenght)
+            pen.left(60*angle)
+            tree(n-10*lenght)
+            pen.right(30*angle)
+            pen.up()
+            pen.backward(n)
+            pen.down()
 turtle.done()