How to blink 8 LEDs at different rates- concurrently?

[rmteo]

To do the equivalent of the code below with each LED blinking at a different rate - except that all 8 LEDs must blink concurrently.

PORTB = 0
TRISB = 0

MAIN:

LOOP1:
  TOGGLE PORTB.0
  PAUSE 500
GOTO LOOP1

LOOP2:
  TOGGLE PORTB.1
  PAUSE 220
GOTO LOOP2

LOOP3:
  TOGGLE PORTB.2
  PAUSE 380
GOTO LOOP1

LOOP4:
  TOGGLE PORTB.3
  PAUSE 750
GOTO LOOP4

LOOP5:
  TOGGLE PORTB.4
  PAUSE 170
GOTO LOOP5

LOOP6:
  TOGGLE PORTB.5
  PAUSE 400
GOTO LOOP6

LOOP7:
  TOGGLE PORTB.6
  PAUSE 620
GOTO LOOP7

LOOP8:
  TOGGLE PORTB.7
  PAUSE 130
GOTO LOOP8

GOTO MAIN