Just press the green flag then space! Also, after that, pick the epic levels, from coolest to normal: 1, 2, 3, 4, 5, or 6 by pressing those keys, then just watch. Please excuse those extra lines out of order. There just aren't enough clones to go around... You also can use the slider...
I used this big brain of mine to manipulate Julia3598's project into this. See for yourself.