Rough first funky solenoid drummer for micro:bit with adafruit's crickit board. It just plays a hardcoded rhythm with random variation. Needs https://makecode.microbit.com/beta and the adafruit crickit extension.

funkyOne.js

input.onButtonPressed(Button.A, function () {
    playRhythmLooped(funkyDrummer, 16, 90);
})

input.onButtonPressed(Button.B, function () {
    for (let i = 0; i < 200; i++) {
        driveNum = Math.randomRange(1, 4)
        strike(driveNum);
        crickit.setPixelColor([16711680, 65280, 255, 16776960][driveNum - 1])
        basic.pause(100)
    }
})

function noStrike() {
    basic.pause(16)
}

function playRhythmOnce(rhythm: number[][], pauseMs: number) {
    rhythm.forEach(function (info) {
        let drumNumber: number;

        if (info.length === 1) {
            drumNumber = info[0];
        }
        else {
            drumNumber = Math.randomRange(0, 100) < info[1] ?
                info[0] : (info.length === 3 ? info[2] : 0);
        }
        if (drumNumber > 0) {
            strike(drumNumber);
            crickit.setPixelColor([80, 16711680, 255, 16776960][drumNumber - 1]);
        } else {
            noStrike();
            //crickit.setPixelOff();
        }
        basic.pause(pauseMs);
    });
}
function playRhythmLooped(rhythm: number[][], numRepeats: number, pauseMs: number) {
    for (let r = 0; r < numRepeats; r++) {
        playRhythmOnce(rhythm, pauseMs);
    }
}
function strike(driveNum: number) {
    let d = getDrive(driveNum);
    d.analogWrite(1023);
    basic.pause(8)
    d.analogWrite(0);
    basic.pause(8)
}
function getDrive(driveNum: number) {
    return [
        crickit.drive1,
        crickit.drive2,
        crickit.drive3,
        crickit.drive4][driveNum - 1];
}
function randomDrive() {
    return getDrive(Math.randomRange(1, 4));
}


let funkyDrummer: number[][] = [
    [2], [1], [2, 50], [1],
    [3], [3, 15, 1], [1], [3],
    [1], [3], [2], [2, 90],
    [3], [1], [1], [3, 30, 1]]
let driveNum = 0
basic.showLeds(`
    # # . . .
    . . # # .
    . . . . .
    . # # # #
    . # # # #
    `)
basic.pause(500);
basic.clearScreen();
[1, 2, 3, 4].forEach(function (dn) { getDrive(dn).setFrequency(1000); });
crickit.setPixelColor(0x008000);