Define a 28-bit synchronous binary counter that uses the 100MHz clock, and a second 4-bit counter that uses one of the bits from the 28-bit counter as a clock. Select a bit from the 28-bit counter that toggles at about .5Hz to use as a clock for the 4-bit counter. Connect the 4-bit counter outputs to four LEDs. Configure your Blackboard, and verify the LEDS toggle at the correct rate.

given the lack of choices, i'm gonna wing it and say that pushing your car off a cliff might not be the best idea. your car might sustain damage from the fall and will probably result in the car being too damaged to jump start.

if that's not good enough, avoid filling the car with bees. bees might get agitated when trapped or during the moving process, and might result in death or painful stings that will make jump starting your car very difficult. but in the event that you do choose to fill your car with bees, remember to wear protective gear!