Alternate between colors before switching off.
Alternate between two colors of the RGB LED A, on repeat 10 times before turning it off.
for (let index = 0; index < 10; index++) {
    sb.setRgbLedColorRGB(sb.rgbLed(SBRgbLed.RgbLedA), 100, 0, 0)
    basic.pause(500)
    sb.setRgbLedColorRGB(sb.rgbLed(SBRgbLed.RgbLedA), 0, 0, 100)
    basic.pause(500)
}
sb.setRgbLedColorRGB(sb.rgbLed(SBRgbLed.RgbLedA), 0, 0, 0)If using micro:bit for the first time, follow this setup.