Create vars with conditions inside a loop

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Hi,

I have the next data

Id	n_lo1	gr1	gr2	gr3	gr4	gr5	gr6	pri
01	0600	15	30	54	78	96	45	A1
02	0700	20	0	12	41	52	25	A1
03	0800	30	40	12	14	23	63	A1
04	0900	45	12	10	12	45	45	A2
05	1000	2	52	8	78	12	67	A2
06	1100	14	20	69	11	14	21	A2
07	1200	78	5	74	78	78	58	A2
08	1300	5	2	90	32	98	47	A3

and I want to generate vars with a lot of combinations but for the example I just gonna write this two: 1) CDT_0600_F_1 2) CDT_0600_F_2

Id	n_lo1	gr1	gr2	gr3	gr4	gr5	gr6	pri	CDT_0600_F_1	CDT_0600_F_2	.......
01	0600	15	30	54	78	96	45	A1	15	30
02	0700	20	0	12	41	52	25	A1
03	0800	30	40	12	14	23	63	A1	30	40
04	0900	45	12	10	12	45	45	A2
05	1000	2	52	8	78	12	67	A2
06	1100	14	20	69	11	14	21	A2
07	1200	78	5	74	78	78	58	A2
08	1300	5	2	90	32	98	47	A3

For that reason, I created the next sintaxis

levelsof n_lo1,local(levels)
foreach m of local levels{
foreach j of numlist 1/6{
gen CDT_`m'_F_`j'=gr`j' if n_lo1=="`m'" & pri=="A1")
gen CDT_`m'_F_`j'=gr`j' if n_lo1=="`m'" & pri=="A2" & `j'<=4)
gen CDT_`m'_F_`j'=gr`j' if n_lo1=="`m'" & pri=="A3" & `j'<=2)
}
}
But It doesn't work with the conditions: ("pri=="A2" & `j'<=2") or (pri=="A3" & `j'<=2) or (pri=="A1")

because it still creating vars with all combinations in spite of the conditions, For example. I just want the next vars in case pri="A3"

CDT_1300_F_1
CDT_1300_F_2

And it creates

CDT_1300_F_1
CDT_1300_F_2
CDT_1300_F_3
CDT_1300_F_4
CDT_1300_F_5
CDT_1300_F_6


I hope you can help me.

Kind Regards,
S.