var b = require('bonescript');

var togglePin = "P8_3";
var usr3 = "USR3";

b.pinMode(usr3, b.OUTPUT);
b.pinMode(togglePin, b.OUTPUT);

var state = b.LOW;
b.digitalWrite(usr3, state);
b.digitalWrite(togglePin, state);

setInterval(toggle, 200);

console.log('b.OUTPUT=' + b.OUTPUT);

function toggle() {
    state ^= b.HIGH;
    b.digitalWrite(usr3, state);
    b.digitalWrite(togglePin, state);

    console.log('state = ' + state);
}