Here is the full code.

And what happens when you run this code? Probably "Global symbol "$co" requires explicit package name", as I said. And if you fix the error, how does the behavior of the code differ from what you wanted? Because it works fine for me.

I got your point.

I suggest you take the time to readreview the following:

• How do I post a question effectively?
• Short, Self-Contained, Correct Example
• I know what I mean. Why don't you?