Change the conditions on me eh ...

How about ...
Code:
;---------------------------------------
Main:
    Random MyWord
    MyByte=(MyWord//6)+1
    GOSUB HIGH_LED
    PAUSE 200
    GOSUB LOW_LED
    PAUSE 200
GOTO Main
;---------------------------------------
 
HIGH_LED:
  SELECT CASE MyByte
    CASE 1 : HIGH LED1
    CASE 2 : HIGH LED2
    CASE 3 : HIGH LED3
    CASE 4 : HIGH LED4
    CASE 5 : HIGH LED5
    CASE 6 : HIGH LED6
  END SELECT
RETURN
 
;---------------------------------------
LOW_LED:
  SELECT CASE MyByte
    CASE 1 : LOW LED1
    CASE 2 : LOW LED2
    CASE 3 : LOW LED3
    CASE 4 : LOW LED4
    CASE 5 : LOW LED5
    CASE 6 : LOW LED6
  END SELECT
RETURN