auto save

my_tree.py

@@ -13,15 +13,24 @@ pen.backward(302)    # 后退
 pen.down()
 
 def tree(n):
-    if n>=15:
+    if n>=0:
+        if n<=12:
+            color=random.choice(['snow','lightcoral','lightgreen','green','darkgreen','yellow','red','pink'])
+            pen.color(color)
+            pen.pensize(n/3)
+        else:
+            pen.color('sienna')
+            pen.pensize(n/10)
+        angle=random.random()
+        length=random.random()
         pen.forward(n)
-        pen.right(30)
-        tree(n-20)
-        pen.left(60)
-        tree(n-20)
-        pen.right(30)
+        pen.right(30*angle)
+        tree(n-15*length)
+        pen.left(60*angle)
+        tree(n-15*length)
+        pen.right(30*angle)
         pen.up()
         pen.backward(n)
         pen.down()
-tree(152)
+tree(60)
 turtle.done()