The other ones I saw were wrong, also didn't include the fill.

Intro
|-------------------------------|
|-------------------------------|
|--------------7---------7------|
|------------9---9--999----9--7-|
|-------------------------------|
|-------------------------------|

Fill
|-------------------------------|
|-------------------------------|
|--------------7---------9------|
|------------9---9--999----9--7-|
|-------------------------------|
|-------------------------------|

Enjoy