Shell Programming and Scripting

This is a variation of an earlier post found here:

unix[dot]com/shell-programming-scripting/159821-merge-two-non-consecutive-lines.html

User Bartus11 was kind enough to solve that example.

Previously, I needed help combining two lines that are non-consecutive in a file. Now I need to do the same thing, but the operation needs to be done on the first 6 lines and then start again on line 7 through line 12. I am having a difficult time explaining, so please see the pattern below.

Original File Here:

Please note, the "Line#:" is there only for reference. The lines can only be distinguished by whether field3 is either "Foo" or "Bar" and if field4 is either START or DONE.

Code:

Line01:  field0,field1,field2,Foo,START 
Line02:  field0,field1,field2,Foo,START 
Line03:  field0,field1,field2,Foo,START 
Line04:  field0,field1,field2,Foo,DONE 
Line05:  field0,field1,field2,Foo,DONE 
Line06:  field0,field1,field2,Foo,DONE
Line07:  field0,field1,field2,Bar,START
Line08:  field0,field1,field2,Bar,START
Line09:  field0,field1,field2,Bar,START
Line10:  field0,field1,field2,Bar,DONE
Line11:  field0,field1,field2,Bar,DONE
Line12:  field0,field1,field2,Bar,DONE

The "Foo, Start" line needs to be combined with the "Foo, Done" line to form "Foo, Start, Foo, Done" and the "Bar, Start" line needs to be combined with the "Bar Done" line to form "Bar, Start, Bar, Done". After combining the lines the file looks as follows:

Code:

field0,field1,field2,Foo,START,field0,field1,field2,Foo,DONE
field0,field1,field2,Foo,START,field0,field1,field2,Foo,DONE
field0,field1,field2,Foo,START,field0,field1,field2,Foo,DONE
field0,field1,field2,Bar,START,field0,field1,field2,Bar,DONE
field0,field1,field2,Bar,START,field0,field1,field2,Bar,DONE
field0,field1,field2,Bar,START,field0,field1,field2,Bar,DONE

So the pattern of the lines is as follows:

Code:

Line01,Line04
Line02,Line05
Line03,Line06
Line07,Line10
Line08,Line11
Line09,Line12

Thanks for any help.