save project

bbb.py

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

my_tree.py

@@ -5,11 +5,24 @@ pen.color('sienna')
 # 画布大小
 # 画布大小
 w = turtle.Screen()
 w = turtle.Screen()
 w.bgcolor('wheat')      # wheat小麦
 w.bgcolor('wheat')      # wheat小麦
-
-# 移动到起点
-pen.left(90)
+n=100
+pen.lt(90)
 pen.up()
 pen.up()
-pen.backward(150)    # 后退
+pen.backward(n)    # 后退
 pen.down()
 pen.down()
 
 
+# 移动到起点
+def x(n):
+    if(n>=50):
+        pen.fd(n)
+        pen.rt(30)
+        x(n-50)
+        pen.lt(60)
+        x(n-50)
+        pen.rt(30)
+        pen.up()
+        pen.backward(n)    # 后退
+        pen.down()
+x(100)
+
 turtle.done()
 turtle.done()