Press and hold a button for maintaining a position.
Use a loop to continuously check if Button A is pressed, and then set the position of the Servo A to either 0 (when pressed) or 100 (while not pressed).
basic.forever(function () {
if (input.buttonIsPressed(Button.A)) {
sb.setServoPosition(sb.servo(SBServo.ServoA), 0)
} else {
sb.setServoPosition(sb.servo(SBServo.ServoA), 100)
}
})If using micro:bit for the first time, follow this setup.