Rotating Object Counterclockwise/Clockwise

Hi,

I'm not able to use tweening for rotation in a project because when exported for AIR Android, tween gets stuck or runs too slowly on the tablet device. (I also prefer not to use a tween plugin, if possible.)

Instead, I can use rotation, and it works very well on the device.

For example,

if (rotateT){
object.rotation += 5;
}
//coupled with
rotateT= true;
                            if (targetRotation < 180) {
                                targetRotation = object.rotation + 90;
                            }
                            else {
                                targetRotation = -targetRotation + 90;
                            }
                        }

This works well for clockwise rotation.

But, I need some help figuring out how to create a counterclockwise rotation using the same type scripting, if this is possible.

Any help appreciated.