Prepare the flowers: cut the red pet bottle to make the tulip and fix it at the stick with glue.
Prepare the heart: cut styrofoam and decorate with collor paper.
The base: use a card box and fix inside a piece of styrofoam to help positioning the flowers, dc motor and leds
Connect the circuit: power to arduino and each arduino output to a pair of leds, another pair of leds and DC motor.
Arduino is used just for blink all output asynchronously.
Final assembly: fix the heart at DC motor and all circuit and then cover the box with green paper (grass).
More decorations: express all your love!