text: const {Board, Switch, Sensor, Motor} = require("johnny-five");
  const Tessel = require("tessel-io");
  const board = new Board({
    io: new Tessel()
  });
  
  board.on("ready", () => {
    const spdt = new Switch("a0");
    const throttle = new Sensor("b0");
  
    // See the comments below for more information about
    // the pins shown in this pin array argument.
    const motor = new Motor([ "a5", "a4", "a3" ]);
  
    spdt.on("open", () => {
      motor.stop().forward(motor.speed());
    });
  
    spdt.on("close", () => {
      motor.stop().reverse(motor.speed());
    });
  
    throttle.on("change", () => {
      motor.speed(throttle.value >> 2);
    });
  });
  /* @markdown
  
  Here's a breakdown of the pins used by these motor drivers, their corresponding Johnny-Five Motor class pin name, and capabilities:
  
  | Control Type/Role | Johnny-Five Motor Pin Name | Breakout Printed Pin |
  | ----------------- | -------------------------- | -------------------- |
  | PWM               | `pwm`                      | `PWMA` or `PWMB`     |
  | Counter Direction | `cdir`                     | `AIN2` or `BIN2`     |
  | Direction         | `dir`                      | `AIN1` or `BIN1`     |
  
  
  @markdown */
  