I lost my brain (Looping Q.) [RESOLVED]

*FOUND MY BRAIN AGAIN*

Greetings,

I have in the moment a blank brain and need input.

I have a combobox the contens of this box =

"T-T-T-N"
"T-T-N-N"
"T-N-N-N"
"N-T-T-T"
"N-N-T-T"
"N-N-N-T"

Depending on the selection the outcome on the screen has to be for

COMBOBOXVALUE OUTPUT
"T-T-T-N" = "TTTT--TTTT--TTTT--NNNN"
"T-T-N-N" = "TTTT--TTTT--NNNN--NNNN"
"T-N-N-N" = "TTTT--NNNN--NNNN--NNNN"
"N-T-T-T" = "NNNN--TTTT--TTTT--TTTT"
"N-N-T-T" = "NNNN--NNNN--TTTT--TTTT"
"N-N-N-T" = "NNNN--NNNN--NNNN--NNNN"

Where the output is repeating it self until 255 charaters are filled.

How can I loop this the fastes way?

Thanks in advance
Manfred