 This is our second test of Ardunio. Actually, it's my cat. Let's spin her out here Here's the board I'm gonna zoom in here a little bit Basically what I've done see if I don't like to keep myself here is I've made a basic stop light Red yellow and that's supposed to be whoops. That's supposed to be green But I don't have any green LEDs and I haven't made a tripped radio shack I don't want to rip anything apart. So Let's just pretend that's green. So it'll be green light yellow red. There's our Ardunio Uno board In case any of you want to go out and buy it. That's what it looks like right there. And of course we are compiling this on our Linux machine KDE Let me plug the board in boards plugged in And we will upload our sketch And this is the C source code that I've written Pretty simple little program. All right says binary sketch size 12.04 done uploading so Here is our working stop light prototype It's on red light. So the green light would flash and then it goes solid green Then it would go to yellow Then it would go to red And then it just loops back green little flash And so it's just going to loop over and over again. This is all running off 5 volts with our little Thing to zoom in there. It's probably blurry All right, 330 ohm resistors