auto save

diy1.py

+distance=1
+pen.speed(1000)
+for i in range(1,300):
+    pen.pencolor(colors[i%4])
+    pen.forward(i)
+    pen.right(91)
+    distance=distance+1
+# 隐藏画笔，保存画布
+pen.hideturtle()
+turtle.done()