Rotating and Moving an Object

I am using TGE 1.5.2 and I have two issues with my objects. I need one object to rotate partially and then rotate the other way (like a pendulum) all the time. And I need the other to move in one direction while a key is pressed. Both of the objects are mountable. I have used the following code during my mount function so far:

// This only repositions on mount, not constant update
// Get the current transform matrix
%matrix = %obj.getTransform();
// determine the xyz position
%xpos = getWord(%matrix, 0) + 10;
%ypos = getWord(%matrix, 1);
%zpos = getWord(%matrix, 2) + 1;
// determine which angle to rotate on, use '1' to use angle xyz
%xrot = 0;
%yrot = 1;
%zrot = 0;
%angle = (45 * 3.14) / 180.0;
// apply the transformation
%obj.setTransform(%xpos SPC %ypos SPC %zpos SPC %xrot SPC %yrot SPC %zrot SPC %angle);

and this works whenever I mount the object. But is this the right code to be used? I need it to be constantly updating while the game is running I assume, but I do not know where to put the code. Any help is well appreciated!