save project

my_tree.py

@@ -10,24 +10,22 @@ def tree(n):
             pen.pensize(n/3)
         else:
             pen.color('sienna')
-            pen.pensize(n/10)
+            pen.pensize(n/10)    
         pen.forward(n)
         angle=random.random()
-        
-        pen.forward(n)
-        angle=random.randint(0,30)
-        lenght=random.randint(1,15)
-        pen.right(angle)
-        tree(n-lenght)
-        pen.left(2*angle)
-        tree(n-lenght)
-        pen.right(angle)
+        pen.right(30*angle)
+        length=1.5*random.random()
+        tree(n-10*angle)
+        pen.left(60*angle)
+        tree(n-10*length)
+        pen.right(30*angle)
         pen.up()
         pen.backward(n)
         pen.down()
 
 pen = turtle.Turtle()
 pen.color('sienna')
+pen.speed(0)
 # 画布大小
 w = turtle.Screen()
 w.bgcolor('wheat')      # wheat小麦
@@ -38,6 +36,6 @@ pen.up()
 pen.backward(150)    # 后退
 pen.down()
 
-tree(60)
+tree(40)
 
 turtle.done()