Easy Macro to Copy/Paste a series of rows

I've tried a couple different attempts at macros but haven't quite found what I'm looking for. I want to create a macro to assign to a button that will automatically copy/paste a series of rows. In the attachment I am looking to copy Rows 8-18 each time I click a button. These rows can be pasted in Row 20. I know there is probably a simple macro to suit my need but I'm very new to these so any help is appreciated.

Once I've got the macro created I can complete the button part on my own.

Thanks in advance!