save project

my_tree.py

@@ -16,22 +16,19 @@ def tree(n):
         else:
             pen.color('sienna')
             pen.pensize(n/10)
-        pen.pensize(n/10)
         pen.forward(n)
-        angle=random.randint(0,30)
-        lengle=random.randint(1,15)
-        pen.right(angle)
-        tree(n-lengle)
-        pen.left(2*angle)
-        tree(n-lengle)
-        pen.right(2*angle)
+        angle=random.random()
+        pen.right(30*angle)
+        lengle=1.5*random.random()
+        
+        tree(n-10*lengle)
+        pen.left(60*angle)
+        tree(n-10*lengle)
+        pen.right(30*angle)
         pen.up()
         pen.backward(n)
         pen.down()
 # 移动到起点
-pen.left(90)
-pen.up()
-pen.backward(150)    # 后退
-pen.down()
-tree(100)
+
+tree(60)
 turtle.done()