Drag horizontally, increase reference vertically

[Young Grasshopper]

Another day, another problem!

I have this code in C5: =IF('Sheet1'!B11="";"";'Sheet1'!$B11)
I need to drag C5:G5 horizontally, so this could would be copied to every 5th column, but the reference cells must increase by one vertically every time.
Like this:
C5: =IF('Sheet1'!B11="";"";'Sheet1'!$B11)
H5: =IF('Sheet1'!B12="";"";'Sheet1'!$B12)
M5: =IF('Sheet1'!B13="";"";'Sheet1'!$B13)
etc.

How would I go about this?
Would appreciate any help

 

[Young Grasshopper]

You make it look easy, Fluff!
Works like a dream, and saved me a ton of work
Thank you and enjoy your evening

 

[Fluff]

You're welcome & thanks for the feedback.

 

[arthurbr]

No they aren't, if B11 is blank you would get a 0 instead of a blank.

Unless B11 already contains the null string ?

 

[ghunderassi]

@Fluff dont get me wrong i was here to help. Just wanted to make my solution when i saw you were already faster. So i tried your solution and gave a fast feedback. Thanks for the solution!

 

[Fluff]

My apologies, I had misread the question & thought you were asking for something different than the OP.