Manipulate data in Awk - regex

Question

I am new to Awk programming.I have a question on manipulating text file,which is required to draw certain Network based images in a visualization software(Circos http://circos.ca)
I have input data for which I want to manipulate values using awk/grep/sed.
There are 9 pairs(18 lines).5 pairs(first 10 lines) are for "from=ABCB11", and 4 pairs(next 8 lines) are for "from =ABCC8". What I want is extract the value from the first line of the first pair and replace it in each alternate line of the rest of the other pairs.
So value for group-2 is 9 10 ,which should replace all the occurence of value in group2.
The next value for group-2 is 28 29,which should be replaced by 9 10.
The stop should be determined by "from=name" which is "from=ABCB11".Its not necessary that the rows that have to captured expression from and replace in its next occurence will belong to group-2 as in this instance.It could be group-3 or group-4 until group-10.So second set ("from =ABCC8")could have been belonged to group-4/5/6 not necessary group-2.Its just a coincidence here.
group-2 9 10 text color=black,from=ABCB11,fromid=4,order=2,thickness=3,to=ACE,toid=11,use=1,z=1
group-3 0 1 text color=black,from=ABCB11,fromid=4,order=2,thickness=3,to=ACE,toid=11,use=1,z=1
group-2 28 29 text color=black,from=ABCB11,fromid=4,order=2,thickness=3,to=CHRM1,toid=114,use=1,z=1
group-5 0 1 text color=black,from=ABCB11,fromid=4,order=2,thickness=3,to=CHRM1,toid=114,use=1,z=1
group-2 29 30 text color=black,from=ABCB11,fromid=4,order=2,thickness=3,to=CHRM2,toid=115,use=1,z=1
group-5 1 2 text color=black,from=ABCB11,fromid=4,order=2,thickness=3,to=CHRM2,toid=115,use=1,z=1
group-2 10 11 text color=black,from=ABCB11,fromid=4,order=2,thickness=3,to=DRD2,toid=158,use=1,z=1
group-3 1 2 text color=black,from=ABCB11,fromid=4,order=2,thickness=3,to=DRD2,toid=158,use=1,z=1
group-2 11 12 text color=black,from=ABCB11,fromid=4,order=2,thickness=3,to=EGF,toid=164,use=1,z=1
group-3 2 3 text color=black,from=ABCB11,fromid=4,order=2,thickness=3,to=EGF,toid=164,use=1,z=1
group-2 21 22 text color=black,from=ABCC8,fromid=5,order=2,thickness=3,to=ACE,toid=11,use=1,z=1
group-3 12 13 text color=black,from=ABCC8,fromid=5,order=2,thickness=3,to=ACE,toid=11,use=1,z=1
group-2 0 1 text color=black,from=ABCC8,fromid=5,order=2,thickness=3,to=ADRA1A,toid=21,use=1,z=1
group-1 0 1 text color=black,from=ABCC8,fromid=5,order=2,thickness=3,to=ADRA1A,toid=21,use=1,z=1
group-2 1 2 text color=black,from=ABCC8,fromid=5,order=2,thickness=3,to=ADRA1B,toid=22,use=1,z=1
group-1 1 2 text color=black,from=ABCC8,fromid=5,order=2,thickness=3,to=ADRA1B,toid=22,use=1,z=1
group-2 2 3 text color=black,from=ABCC8,fromid=5,order=2,thickness=3,to=ADRA1D,toid=23,use=1,z=1
group-1 2 3 text color=black,from=ABCC8,fromid=5,order=2,thickness=3,to=ADRA1D,toid=23,use=1,z=1
Below is the FINAL output,I am looking for:
group-2 9 10 text color=black,from=ABCB11,fromid=4,order=2,thickness=3,to=ACE,toid=11,use=1,z=1
group-3 0 1 text color=black,from=ABCB11,fromid=4,order=2,thickness=3,to=ACE,toid=11,use=1,z=1
group-2 9 10 text color=black,from=ABCB11,fromid=4,order=2,thickness=3,to=CHRM1,toid=114,use=1,z=1
group-5 0 1 text color=black,from=ABCB11,fromid=4,order=2,thickness=3,to=CHRM1,toid=114,use=1,z=1
group-2 9 10 text color=black,from=ABCB11,fromid=4,order=2,thickness=3,to=CHRM2,toid=115,use=1,z=1
group-5 1 2 text color=black,from=ABCB11,fromid=4,order=2,thickness=3,to=CHRM2,toid=115,use=1,z=1
group-2 9 10 text color=black,from=ABCB11,fromid=4,order=2,thickness=3,to=DRD2,toid=158,use=1,z=1
group-3 1 2 text color=black,from=ABCB11,fromid=4,order=2,thickness=3,to=DRD2,toid=158,use=1,z=1
group-2 9 10 text color=black,from=ABCB11,fromid=4,order=2,thickness=3,to=EGF,toid=164,use=1,z=1
group-3 2 3 text color=black,from=ABCB11,fromid=4,order=2,thickness=3,to=EGF,toid=164,use=1,z=1
group-2 21 22 text color=black,from=ABCC8,fromid=5,order=2,thickness=3,to=ACE,toid=11,use=1,z=1
group-3 12 13 text color=black,from=ABCC8,fromid=5,order=2,thickness=3,to=ACE,toid=11,use=1,z=1
group-2 21 22 text color=black,from=ABCC8,fromid=5,order=2,thickness=3,to=ADRA1A,toid=21,use=1,z=1
group-1 0 1 text color=black,from=ABCC8,fromid=5,order=2,thickness=3,to=ADRA1A,toid=21,use=1,z=1
group-2 21 22 text color=black,from=ABCC8,fromid=5,order=2,thickness=3,to=ADRA1B,toid=22,use=1,z=1
group-1 1 2 text color=black,from=ABCC8,fromid=5,order=2,thickness=3,to=ADRA1B,toid=22,use=1,z=1
group-2 21 22 text color=black,from=ABCC8,fromid=5,order=2,thickness=3,to=ADRA1D,toid=23,use=1,z=1
group-1 2 3 text color=black,from=ABCC8,fromid=5,order=2,thickness=3,to=ADRA1D,toid=23,use=1,z=1
Also,this is just a sample data.So many pairs would have group-1,group-4,group-5 upto group 10.Here,only pairs from lesser groups are mentioned.
I want to loop through the lines until the value in "from=name" remains same,so that I can change all occurences in each alternate line.Code:
awk -F, 'NR%2==1 {split($2,a,"="); print a[2]}' file.txt
The above code is able to extract the alternate lines and the "name" in "from=name"

Answer 1

The following is quite verbose (I love verbose variable names). Using your sample-data, I get the data you want to have. This assumes, that every "uneven" line gets the values from the first line with the same "from=xxxx" information.
awk '
BEGIN {
namevar=""
val1var=""
val2var=""
linenum=0
}
{
split($0, linearr)
split(linearr[5], csvarr, ",")
if (namevar != csvarr[2]) {
namevar=csvarr[2]
val1var=linearr[2]
val2var=linearr[3]
linenum=0
}
linenum+=1
if (linenum%2==1) {
print linearr[1], val1var, val2var, linearr[4], linearr[5]
} else {
print linearr[1], linearr[2], linearr[3], linearr[4], linearr[5]
}
}' file.txt