Is this correct LUA?

[unlimit]

So, I tried to play with some LUA and VFL things again.

function dscd()
	local divinestormcd, duration, enabled = GetSpellCooldown("Divine Storm");
	if ( divinestormcd > 0 and duration > 1.5) then
		VFL.AdaptiveSchedule(dstas, 0.1, dst);
	end
end;
VFL.AdaptiveSchedule(nil, 0.1, dscd);

function dst()
	local divinestormcd, duration, enabled = GetSpellCooldown("Divine Storm");
	if ( divinestormcd > 0 and duration > 1.5) then
		nil
	else
		print("Divine Storm Ready!") and VFL.AdaptiveUnschedule(dstas);
	end
end;

I want RDX to track my Divine Storm cooldown for me, and this is what I got. (stole most of the script from other sources, and tried to scrap it all together X_X)