My subaru forester has an electrical/fuse issue, battery dies

Left my 2000 subaru forester parked for 2 days
while out of town and when I got back the car had
died. After jumping I realized why the battery must
have drained. Dash lights, tail lights and flashers
are all blinking in intervals whether the car is on or
off  until the battery drains out. Nothing was off
with the car when I  last drove it. I tried
disconnecting some fuses under the hood in hopes
it would stop but not knowing much about cars I
couldn't figure out which fuse or if that's definitely
the issue...Does anyone have any ideas for me as
to what's causing the lights to flash on and off or
how to fix it?