save project

my_tree.py

+# 创建画笔 pen
 import turtle
 import turtle
-
-pen = turtle.Turtle()
-pen.color('sienna')
-# 画布大小
-w = turtle.Screen()
-w.bgcolor('wheat')      # wheat小麦
-
-# 移动到起点
+def tree(n)
+    if n >=0
+    pen.forwad(n)
+    pen.right(30)
+    tree(n-10)
+    pen.left(60)
+    tree(n-10)
+    pen.right(30)
+    pen.up()
+    pen.backward(n)
+    pen.down()
+pen=t.Pen()
+# 设置画笔颜色为'sienna'
+pen.pencolor('sienna')
+pen.speed(0)
+# 创建画布
+screen=t.Screen()
+# 设置画布颜色为'wheat'
+screen.bgcolor('wheat')
+# 设置起点 先向左旋转90
 pen.left(90)
 pen.left(90)
-pen.up()
-pen.backward(150)    # 后退
-pen.down()
-
-def tree(n):
-    if n  >=50:
-        pen.forward(n)
-        pen.right(30)
-        tree(n-50)
-        pen.right(30)
-        pen.up()
-        pen.backward(n)
-        pen.down()
-tree(100)
-turtle.done
-
-
-
-turtle.done()
-
+# 抬笔
+pen.penup()
+# 向后移动150步
+pen.backward(150)
+# 落笔
+pen.pendown()
+# 调用函数tree
+tree(60)
+# 结束运行
+t.done()