Camera Manipulation

I was trying to make an intro thing, and make the camera move around. here is my script. Some reason it didn't work.

c = game.Workspace.CurrentCamera
pos1 = CFrame.new(1,1,1)
pos2 = CFrame.New(2,3,2)

function TweenCam(co, fo, step)
	c1,f1 = c.CoordinateFrame, c.Focus 
	for 1=-90,90,step do
		r = math.cos(math.rad(i+1)-1/2)
		c.CoordinateFrame=CFrame.new(fo.p:lerp(f1, r))
	end
end

wait(1)
TweemCam(pos1, pos2, 1)

Please help me and say if i did anything wrong.