auto save

my_tree.py

+import turtle
+import random
+pen = turtle.Turtle()
+pen.color('sienna')
+# 画布大小
+w = turtle.Screen()
+w.bgcolor('wheat')      # wheat小麦
+pen.pensize(5)
+# 移动到起点
+pen.left(90)
+pen.up()
+pen.backward(150)
+pen.pendown()
+pen.speed(1000) 
+def tree(n):
+    if n>=0:
+        lengh=random.randint(0,15)
+        x=random.randint(0,20)
+        pen.forward(n)
+        pen.right(x)
+        tree(n-lengh)
+        pen.left(2*x)
+        tree(n-lengh)
+        pen.right(x)
+        pen.penup()
+        pen.backward(n)
+        pen.pendown()
+        if n<=12:
+            y=["lightcoral" , "snow"]
+            color=random.choice(y)
+            pen.color(color)
+            pen.pensize(n/3)    
+        else:
+            pen.pencolor("sienna")
+            pen.pensize(n/10)
+
+n=tree(70)
+#pen.left(90)
+#pen.up()
+#pen.backward(150)    # 后退
+#pen.down()
+#pen.forward(100)
+#pen.right(30)
+#pen.forward(50)
+#pen.backward(50)
+#pen.left(60)
+#pen.forward(50)
+turtle.done()