Fritzing Creator Kit - #01 Blink
An LED lights up when there is a voltage. However, it is important to connect it properly. Attach the long leg (anode) to the circuit's positive pole and the short leg (cathode) to GND.
Try to make the light blink at a different rhythm.
Try to blink an SOS in the Morse code: short, short, short, long, long, long, short, short, short – pause.