Here are some basic circuits for LED projects.
1.) This basic LED circuit just uses common components as a power source, resistor, and LED.
2.) Parallel LED circuit uses the same components but with multiple LEDs. Please note that with more LEDs, you will need to change your resistor value and possibly your power supply.
3.) You can also put LEDs in series. This circuit will also need to have the values of the resistor and/or power supply changed.