save project

my_tree.py

@@ -13,6 +13,25 @@ pen.backward(150)    # 后退
 pen.down()
 def tree(n):
     if n>=50:
+        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.forward(n)
+        angle = random.random()
+        pen.right(30*angle)
+        length = 1.5*random.random()
+        tree(n-10*length)
+        pen.left(60*angle)
+
+
+
+
+
         pen.forward(n)
         pen.right(30)
         tree.(n-10)