for this you'll want to use the property "img_mole.visible", and make all your moles a control array, so you can generate a radnom number, int_mole = int(rnd*number_of_moles + 1), but you want to have a for...next loop to make sure all your moles aren't visible, this is where the control array come in handy. for i = img_mole.lbound to img_mole.ubound. and with a timer and a couple of things it should be fairly easy.