save project

my_tree.py

@@ -9,15 +9,26 @@ pen.left(90)
 pen.up()
 pen.backward(150)    # 后退
 pen.down()
+turtle.speed(100)
 # 移动到起点
 def tree(n):
-    if n>=50:
+    if n>=0:
+        if n <=12:
+            coloer_list=['snow','lightcoral']
+            coloer=random.choice(color_list)
+            pen.color(color)
+            pen.pensize(n/3)
+        else:
+            pen.coloer('sienna')
+            pen.size(n/10)
         pen.forward(n)
-        pen.right(30)
-        tree(n-10)
-        pen.left(60)
-        tree(n-10)
-        pen.right(random.randint(10,35))
+        angle=random.randint(0,30)
+        pen.right(30*angle)
+        length=1.5*random.randint(0,30)
+        tree(n-10*lenght)
+        pen.left(60*angle)
+        tree(n-10*lenght)
+        pen.right(30*angle)
         pen.up()
         pen.backward(n)
         pen.down()