save project

my_tree.py

 import turtle
-
+import random
 pen = turtle.Turtle()
 pen.color('sienna')
 # 画布大小
@@ -11,5 +11,17 @@ pen.left(90)
 pen.up()
 pen.backward(150)    # 后退
 pen.down()
-
+def p(l):
+    if l>=50:
+        pen.forward(l)
+        pen.right(30)
+        p(l-random.randint(5,10))
+        pen.up()
+        pen.down()
+        pen.left(60)
+        p(l-random.randint(5,10))
+        pen.up()
+        pen.right(30)
+        pen.backward(l)
+p(random.randint(50,100))
 turtle.done()