save project

my_tree.py

 import turtle
 
+def tree(n):
+    if n>=50:
+        pen.fd(n)
+        pen.rt(30)
+        tree(n-50)
+        pen.lt(60)
+        tree(n-50)
+        pen.rt(30)
+        pen.up()
+        pen.backward(n)
+        pen.pd()
+       
+
+
+
+
+
 pen = turtle.Turtle()
 pen.color('sienna')
 # 画布大小
 w = turtle.Screen()
 w.bgcolor('wheat')      # wheat小麦
-
-# 移动到起点
+# 回到起点
 pen.left(90)
 pen.up()
 pen.backward(150)    # 后退
 pen.down()
-
+# 树枝
+# pen.fd(100)
+# pen.rt(30)
+# pen.fd(50)
+# pen.up()
+# pen.bk(50)
+# pen.pd()
+# pen.lt(60)
+# pen.fd(50)
+# pen.up()
+# pen.bk(50)
+# pen.rt(30)
+# pen.bk(100)
+# pen.pd()
+tree(100)
 turtle.done()