Picture of Blink- Your First Arduino Project
Blink is a great first project for Arduino beginners. It is so simple you can do it in ten minutes with this instructable. 

Step 1: Materials

Picture of Materials
Arduino Cable

(optional) Two AA batteries
skippymoore123 made it!9 months ago

this was my first actual arduino project i use it every time to make sure my board is working fine

Veda882 years ago
Also, if you don't have an led, the arduino has an led soldered on pin 13 (that's probably why this example uses pin13). On my arduino this led is marked with "L". So, if you follow this manual, except for the led stuff, you should see that arduino led blink :)