auto save

my_tree.py

@@ -12,27 +12,28 @@ pen.left(90)
 pen.up()
 pen.backward(150)    # 后退
 pen.down()
+
 def tree(n):
-    if n>=50:
+    if n>=0:
+        if n <= 12:
+            color_list=["snow","lightcoral"]
+            color=random.choice(color_list)
+            pen.pencolor(color)
+            pen.pensize(n/3)
+        else:
+            pen.pencolor("sienna")
+            pen.pensize(n/10)
+        angle=random.randint(1,15)
+        length=random.randint(0,15)
         pen.forward(n)
-        pen.right(30)
-        tree(n-10)
-        pen.left(60)
-        tree(n-10)
-        pen.right(30)    
+        pen.right(angle)
+        tree(n-length)
+        pen.left(angle*2)
+        tree(n-length)
+        pen.right(angle)    
         pen.up()
         pen.backward(n)
         pen.down()
         
-tree(100)
-# pen.fd(100)
-# pen.right(30)
-# pen.fd(50)
-# pen.backward(50)
-# pen.left(60)
-# pen.fd(50)
-# pen.up()
-# pen.backward(50)
-# pen.right(30)
-# pen.backward(100)
+tree(60)
 turtle.done()