More efficient method of rotation?

So I have two unions which I can't union together, but I'm trying to get them to rotate 360* when the script is active, it works, but it is very inefficient.

sp = script.Parent
while true do
	sp.A.Rotation = Vector3.new(-180, -0, -180)
	sp.B.Rotation = Vector3.new(-180, -0, -180)
	wait(0.07)
	sp.A.Rotation = Vector3.new(-180, -15, -180)
	sp.B.Rotation = Vector3.new(-180, -15, -180)
	wait(0.07)
	sp.A.Rotation = Vector3.new(-180, -30, -180)
	sp.B.Rotation = Vector3.new(-180, -30, -180)
	wait(0.07)
	sp.A.Rotation = Vector3.new(-180, -45, -180)
	sp.B.Rotation = Vector3.new(-180, -45, -180)
	wait(0.07)
	sp.A.Rotation = Vector3.new(-180, -60, -180)
	sp.B.Rotation = Vector3.new(-180, -60, -180)
	wait(0.07)
	sp.A.Rotation = Vector3.new(-180, -75, -180)
	sp.B.Rotation = Vector3.new(-180, -75, -180)
	wait(0.07)
	sp.A.Rotation = Vector3.new(0, -90, 0)
	sp.B.Rotation = Vector3.new(0, -90, 0)
	wait(0.07)
	sp.A.Rotation = Vector3.new(0, -75, 0)
	sp.B.Rotation = Vector3.new(0, -75, 0)
	wait(0.07)
	sp.A.Rotation = Vector3.new(0, -60, 0)
	sp.B.Rotation = Vector3.new(0, -60, 0)
	wait(0.07)
	sp.A.Rotation = Vector3.new(0, -45, 0)
	sp.B.Rotation = Vector3.new(0, -45, 0)
	wait(0.07)
	sp.A.Rotation = Vector3.new(0, -30, 0)
	sp.B.Rotation = Vector3.new(0, -30, 0)
	wait(0.07)
	sp.A.Rotation = Vector3.new(0, -15, 0)
	sp.B.Rotation = Vector3.new(0, -15, 0)
	wait(0.07)
	sp.A.Rotation = Vector3.new(0, -00, 0)
	sp.B.Rotation = Vector3.new(0, -00, 0)
	wait(0.07)
	sp.A.Rotation = Vector3.new(0, 15, 0)
	sp.B.Rotation = Vector3.new(0, 15, 0)
	wait(0.07)
	sp.A.Rotation = Vector3.new(0, 30, 0)
	sp.B.Rotation = Vector3.new(0, 30, 0)
	wait(0.07)
	sp.A.Rotation = Vector3.new(0, 45, 0)
	sp.B.Rotation = Vector3.new(0, 45, 0)
	wait(0.07)
	sp.A.Rotation = Vector3.new(0, 60, 0)
	sp.B.Rotation = Vector3.new(0, 60, 0)
	wait(0.07)
	sp.A.Rotation = Vector3.new(0, 75, 0)
	sp.B.Rotation = Vector3.new(0, 75, 0)
	wait(0.07)
	sp.A.Rotation = Vector3.new(0, 90, 0)
	sp.B.Rotation = Vector3.new(0, 90, 0)
	wait(0.07)
	sp.A.Rotation = Vector3.new(-180, 75, 180)
	sp.B.Rotation = Vector3.new(-180, 75, 180)
	wait(0.07)
	sp.A.Rotation = Vector3.new(-180, 60, 180)
	sp.B.Rotation = Vector3.new(-180, 60, 180)
	wait(0.07)
	sp.A.Rotation = Vector3.new(-180, 45, 180)
	sp.B.Rotation = Vector3.new(-180, 45, 180)
	wait(0.07)
	sp.A.Rotation = Vector3.new(-180, 30, 180)
	sp.B.Rotation = Vector3.new(-180, 30, 180)
	wait(0.07)
	sp.A.Rotation = Vector3.new(-180, 15, 180)
	sp.B.Rotation = Vector3.new(-180, 15, 180)
	wait(0.07)
end

Iteration Loops! You can encase that all into two loops and make it much, much more friendly to all of our eyes!

Example:

sp = script.Parent
while true do
    for i=1,11 do
    sp.A.Rotation = Vector3.new(-180, 90-(i*15), -180)
    sp.B.Rotation = Vector3.new(-180, 90-(i*15), -180)
    wait(0.07)
    end
    for i=1,13 do
    sp.A.Rotation = Vector3.new(0, -105 + (i*15), 0)
    sp.B.Rotation = Vector3.new(0, -105 + (i*15), 0)
    wait(0.07)
    end 
end

Its fine, many developers use rotations like this (for example ScriptOn) instead of animations and other ways to rotate stuff. In many cases it might be smoother but its quite unlikely the client would lag from the script.