I had connected one resistor 270 ohm with four blue LEDs in parallel but did fried it. After that, i connect one resistor 1k ohm with four blue LEDs but also did fried it slowly.
Please post a photo or a schematic of how you connected it.
And what voltage did you use?
That is very important if you want a useable answer.
Is it logic if i connect it in parellel or suppose connect in series by every blue LED connect with 1k ohm?
I simply don't have a clue to what you mean here
Blue LEDs are very expensive so i dont want to buy it again by not fry it. Mind tell me the solution please? I need your guidance
Blue LED's are cheap if you shop around a bit online.
We don't min telling you the solution, but we can't with the info you provided so far!