explain how to use the window immediate in the VBA

Hello Guys!
I really want to learn VBA, But I don't know how to fix mistake when I wrote the code in VBA.
Example I have a file below.
I try to correct my mistake in the file when I use the Immediate (Ctrl+G) and enter it. so that result is name in this file.
But I can not fix mistake the code when I saw that.
Please tell me how to use and how to fix again my mistake.