save project

my_tree.py

@@ -4,18 +4,18 @@ pen = turtle.Turtle()
 pen.color('sienna')
 # 画布大小
 w = turtle.Screen()
-w.bgcolor('wheat')      # wheat小麦
+w.bgcolor('firebrick2')      # wheat小麦
 
 # 移动到起点
-pen.hideturtle()
-pen.speed(100)
+#pen.hideturtle()
+pen.speed(0)
 pen.pensize(5)
 pen.left(90)
 pen.up()
 pen.backward(150)    # 后退
 pen.down()
 
-pen.forward(100)
+'''pen.forward(100)
 pen.right(30)
 pen.forward(50)
 pen.up()
@@ -27,5 +27,18 @@ pen.up()
 pen.backward(50)
 pen.right(30)
 pen.down()
-pen.backward(100)
+pen.backward(100)'''
+
+def tree(n):
+    if n>=50:
+        pen.stamp()
+        pen.forward(n)
+        pen.right(30)
+        tree(n-10)
+        pen.left(30*2)
+        tree(n-10)
+        pen.right(30)
+        pen.backward(n)
+        
+tree(100)
 turtle.done()