save project

my_tree.py

+import turtle
+
+def t(n):
+    if n>=0:
+        pen.forward(n)
+        pen.right(30)
+        t(n-10)
+        pen.left(60)
+        t(n-10)
+        pen.right(30)
+        pen.up()
+        pen.backward(n)
+        pen.down()
+        
+
+
+pen = turtle.Turtle()
+pen.color('sienna')
+# 画布大小
+w = turtle.Screen()
+w.bgcolor('wheat')      # wheat小今后九月份好i一口i有益于i语录体uu一股有i也同样关于u
+pen.speed(100)
+# 移动到起
+pen.left(90)
+pen.up()
+pen.backward(100)
+pen.down()
+        
+t(99)
+turtle.done()