save project

my_tree.py

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