auto save

my_tree.py

 import turtle
+import random
+
+def tree(n):
+    if n>=0:
+        if n < =12:
+            color_list = ["soow","lightcoral"]
+            color = random.choice(color_list)
+            pen.color(color)
+            
+        pen.forward(n)
+        pen.right(30)
+        tree(n-10)
+        pen.left(60)
+        tree(n-10)
+        pen.right(30)
+        pen.up
+        pen.backward(n)
+        pen.down()
+    
 
 pen = turtle.Turtle()
 pen.color('sienna')
@@ -12,13 +31,7 @@ pen.up()
 pen.backward(150)    # 后退
 pen.down()
 
-pen.forward(100)
-pen.left(30)
-pen.forward(50)
-pen.backward(50)
-pen.right(60)
-pen.forward(50)
-pen.backward(50)
-pen.left(30)
-pen.backward(100)
-turtle.done()
+
+tree(60)
+
+turtle.done()
\ No newline at end of file