save project

my_tree.py

@@ -14,23 +14,27 @@ pen.backward(150)    # 后退
 pen.down()
 
 def tree(n):
-    if n >= 10:
-        lenth = random.randint(5,15)
+    if n >= 0:
+        lenth = random.randint(2,16)
         if n <= 12:
             pen.pensize(lenth /3)
-            color = random.choice("snow","lightcoral")
+            color = random.choice(("snow","lightcoral","lightcoral"))
             pen.color(color)
         else:
-            pen.color(sienna)
+            pen.color("sienna")
             pen.pensize(n /10)
         angle = random.randint(5,40)
+        # angle_1 = n /4
         pen.forward(n)
+        # pen.left(angle -angle_1)
         pen.left(angle)
         # if n > 50:
         tree(n -lenth)
+        # pen.right((angle -angle_1) *2)
         pen.right(angle *2)
         # if n > 50:
         tree(n -lenth)
+        # pen.left(angle -angle_1)
         pen.left(angle)
         pen.up()
         pen.backward(n)