BL / PY : Draw an image of a heart on the LED display and then make the heart 'beat' by pulsing through brighter to dimmer and back again for ever. It might be better if you don't take the brightness right down to 0 so the LEDs stay lit - it'll look better. HINT : If you are trying this in micropython, firstly, it's hard and secondly, the range of brightness goes from 0 (off) to 9 (brightest).