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my_tree.py

@@ -5,17 +5,22 @@ pen.color('sienna')
 # 画布大小
 w = turtle.Screen()
 w.bgcolor('wheat')      # wheat小麦
-def tree(n):
-    if n>=50:
+
 # 移动到起点
-        pen.forward(n)
-        pen.right(30)
-        tree(n-10)    # 后退
-        pen.left(60)
-        tree(n-10)
-        pen.right(30)
-        pen.up()
-        pen.backward(80)
-        pen.down()
-n=80        
+pen.left(90)
+pen.up()
+pen.backward(150)    # 后退
+pen.down()
+pen.forward(100)
+pen.right(30)
+pen.forward(80)
+pen.penup()
+pen.backward(80)
+pen.left(60)
+pen.pendown()
+pen.forward(80)
+pen.penup()
+pen.backward(80)
+pen.right(30)
+pen.backward(100)
 turtle.done()