auto save

my_tree.py

-import turtle
+import turtle,random
 
 pen = turtle.Turtle()
 pen.color('sienna')
+pen.speed(0)
 # 画布大小
 w = turtle.Screen()
 w.bgcolor('wheat')      # wheat小麦
@@ -12,5 +13,26 @@ pen.up()
 pen.backward(150)    # 后退
 pen.down()
 
+def tree(n):
+    if n>= 10:
+        if n<=20:
+            pen.pencolor(random.choice(['snow','lightcoral']))
+            pen.pensize(n/3)
+        else:
+            pen.pencolor("sienna")
+            pen.pensize(n/10)
+        angle = random.randint(10,30)
+        length = random.randint(1,15)
+        pen.forward(n)
+        pen.right(angle)
+        tree(n-length)
+        pen.left(angle*2)
+        tree(n-length)
+        pen.right(angle)
+        pen.up()
+        pen.backward(n)
+        pen.down()
+
+tree(60)
 
 turtle.done()