YOU SAID:

i was on my computer until four am

INTO JAPANESE

午前4時までパソコンをいじっていた

BACK INTO ENGLISH

I was fiddling with the computer until 4:00 a.m.

INTO JAPANESE

午前4時までパソコンをいじっていました

BACK INTO ENGLISH

I was fiddling with the computer until 4:00 a.m.