SpaceRock/objects/obj_title/Step_0.gml

t += 0.01;

y = base_y + sin(t) * 5;
image_xscale = 1 + sin(t) * 0.05;
image_yscale = 1 + sin(t) * 0.05;
image_alpha  = 0.9 + sin(t) * 0.1;