Multiple conditions in a While Loop - IDL

Multiple conditions in a While Loop - IDL

I am trying to create a multiple condition while loop in IDL with no
success. For example:
while (delta_flux gt 1.0) or (lt -1.0) do begin
;something here...
endwhile
returns:
IDL> .run flare_finder_while_attempt5.pro
while (delta_flux gt 1.0) or (lt -1.0) do begin
^
% Syntax error.
Is there a way of doing this?