 For the Circuit Python Parsec today, I wanted to talk about using the Circuit Playground Library to make it really, really easy to play tones on the Circuit Playground Bluefruit or the Circuit Playground Express. I can use, in Circuit Python, the Circuit Playground Library to make stuff super easy and very consistent type of syntax. I'm going to reset and you're going to hear it play some little tones. The way that works, I import the Circuit Playground Library as CP and then I use CP.PlayTone and then I give it a frequency, in this case I'm giving it an A, and the duration, in this case I'm giving it one second. And then this is followed by a B, a C, and a D. So that's that first little set of tones that plays. Now, if I want to go ahead and use the buttons, this is where Circuit Playground gets really nice and easy to teach or to learn, in this case, again, I import that library and then if the CP.ButtonA is true, which means that button has been pressed, then we're going to play a C. And again, I'll hold this up to my mic so you can hear it. So here we go. I'm going to press the A button and it plays the C. If I press the B button, it plays a D. And then finally what I'll do is a version that, instead of using PlayTone, uses StartTone and StopTone. So what those do is give you the ability to just play a tone forever until you say otherwise. So here I'm going to go ahead and re-save this. You can see from Circuit Playground Library, I'm importing CP, while true, the main loop, if CP.ButtonA is pressed, then we're going to start the tone, a 660 and E. It's going to play that until I let go. Same sort of thing with button B, it'll play a G until I let go. And there you can see the else is StopTone and that's what stops the tones from playing. So again, I'll hold this up and you can hear, that's just going to play that forever and ever and ever. And then I'll press the other button until I let go. So that is how you can use StartTone, StopTone and PlayTone inside of the Circuit Playground Library in Circuit Python in order to make some basic music. And that is your Circuit Python Parsec.