Code

Let’s start by playing music when the A button is pressed. To do that, register an event handler that will execute whenever you click on the A button. Open the ||input:Input|| drawer and get out an ||input:on button A pressed|| block. Next, add a ||music:rest|| to play nothing for 1/16 of a beat.

input.onButtonPressed(Button.A, () => {
    music.rest(music.beat(BeatFraction.Sixteenth));
});

We also want to add a variable where you can store data. Name the variable light and ||variables:set|| the value of the variable to the ||input:light level|| block from the ||input:Input|| drawer. This will get the light level as some value between 0 (dark) and 255 (bright). The light is measured by using various LEDs from the screen. Your code will look like this:

input.onButtonPressed(Button.A, () => {
    music.rest(music.beat(BeatFraction.Sixteenth));
    let light = input.lightLevel();
});

Click on the ||logic:Logic|| drawer and find an ||logic:if|| block to use so that some of your code will run conditionally depending on whether a Boolean condition is either true or false. Go get the ||logic:0 < 0|| comparison block an put it in as the condition for the ||logic:if||. Then insert the variable ||variables:light|| into the part of the inequality where the first 0 is. You’ll find the variable ||variables:light|| in the ||variables:Variables|| drawer. Finally, insert 25 in the second part of the comparison instead of 0. Modify your code so that it checks the light level like this:

• If ||logic:light < 25||, play ||music:ring tone|| for Middle C
• If this condition is not true, play ||music:ring tone|| for Middle A

input.onButtonPressed(Button.A, () => {
    music.rest(music.beat(BeatFraction.Sixteenth));
    let light = input.lightLevel();
    if (light < 25) {
        music.ringTone(music.noteFrequency(Note.C));
    }
    else {
        music.ringTone(music.noteFrequency(Note.A));
    }
});

Now, we want to add more conditional statements by clicking on the (+) at the bottom of the if. Add 5 ||logic:else if|| and 1 final ||logic:else|| inside the ||logic:if|| block structure. Set the comparison blocks inside the new conditionals as:

• If ||logic:light < 50||, play ||music:ring tone|| Middle D
• If ||logic:light < 100||, play ||music:ring tone|| Middle E
• If ||logic:light < 150||, play ||music:ring tone|| Middle F
• If ||logic:light < 180||, play ||music:ring tone|| Middle G
• If these conditions are not true, play ||music:ring tone|| Middle A

input.onButtonPressed(Button.A, () => {
    music.rest(music.beat(BeatFraction.Sixteenth));
    let light = input.lightLevel();
    if (light < 25) {
        music.ringTone(music.noteFrequency(Note.C));
    }
    else if (light < 50) {
        music.ringTone(music.noteFrequency(Note.D));
    }
    else if (light < 100) {
        music.ringTone(music.noteFrequency(Note.E));
    }
    else if (light < 150) {
        music.ringTone(music.noteFrequency(Note.F));
    }
    else if (light < 180) {
        music.ringTone(music.noteFrequency(Note.G));
    }
    else {
        music.ringTone(music.noteFrequency(Note.A));
    }
});

Alright, now click Download and run your code on the micro:bit!