size_x = transform.position[0]*2;
size_y = transform.position[1];

x_offset = effect("Offset")("Shift Center To")[0]+(time*(size_x/thisComp.duration));

if(time < (thisComp.duration/2)){
	y_offset = ease(time, 0, thisComp.duration/2, size_y, size_y*2);
} else {
	y_offset = ease(time, thisComp.duration/2, thisComp.duration, size_y*2, size_y);
}

[x_offset, y_offset];