save project

my_tree.py

@@ -13,9 +13,10 @@ pen.backward(150)    # 后退
 pen.down()
 pen.down()
 def tree(n):
 def tree(n):
     if n>=0:
     if n>=0:
+        pen.pensize(n/10)snow,lightcoral
         pen.forward(n)
         pen.forward(n)
-        angle=random.randint(1,30)
-        long=random.randint(1,15)
+        angle=random.randint(10,30)
+        long=random.randint(1,20)
         pen.right(angle)
         pen.right(angle)
         tree(n-long)
         tree(n-long)
         pen.left(2*angle)
         pen.left(2*angle)
@@ -25,5 +26,5 @@ def tree(n):
         pen.backward(n)
         pen.backward(n)
         pen.pendown()
         pen.pendown()
         pen.speed(0)
         pen.speed(0)
-tree(60)
+tree(70)
 turtle.done()
 turtle.done()