glb.gltranslate(0,0,-4+((sin(time*1.32)+cos(time*1.54))*0.2));
Change the -4 to different values like -2 and -6 and see what happens
glb.gltranslate(0,0,-2+((sin(time*1.32)+cos(time*1.54))*0.2));
glb.gltranslate(0,0,-6+((sin(time*1.32)+cos(time*1.54))*0.2));