I use a 1-5, 1-4 and, rarely, 1-3. After repeating the same octave, changing the 1-5 and 1-4, or when I'm tired, and I use the thumb and the first pitch in a 4-5 in another note (one octave), with a wrist relaxed.

I thought you must be learning some tips so I just visit to catch some tips. but hard luck.

I completely agree with robert. you should be learn that.