Introduction: LED for Arduino

Refer to the work of this person.
We need,
1x Arduino
1x Breadboard
1x - USB Cable
3x 100 Ohm Resistor

Step 1: The Circuit

connect pin 7 10 12 on your Arduino on spot on your breadboard, then your resistor. On the other side of the resister, insert the led.

Step 2: The Code

Step 3: Video