Pre-JSON script for LED toggling

gistfile1.js

var bone = require('bonescript');
var state = bone.LOW;

bone.pinMode("USR0", bone.OUTPUT);
bone.pinMode("USR1", bone.OUTPUT);
bone.pinMode("USR2", bone.OUTPUT);
bone.pinMode("USR3", bone.OUTPUT);
setInterval(toggle, 10);

function toggle() {
    var chanceUSR0 = Math.floor(Math.random()*100);
    var chanceUSR1 = Math.floor(Math.random()*100);
    var chanceUSR2 = Math.floor(Math.random()*100);
    var chanceUSR3 = Math.floor(Math.random()*100);

if (chanceUSR0 > 90) {
        if(state == bone.LOW) state = bone.HIGH;
        else state = bone.LOW;
        bone.digitalWrite("USR0", state);
    }
    
    if(chanceUSR1 > 90) {
        if(state == bone.LOW) state = bone.HIGH;
        else state = bone.LOW;
        bone.digitalWrite("USR1", state);
    }

    if(chanceUSR2 > 90) {
        if(state == bone.LOW) state = bone.HIGH;
        else state = bone.LOW;
        bone.digitalWrite("USR2", state);
    }

    if(chanceUSR3 > 90) {
        if(state == bone.LOW) state = bone.HIGH;
        else state = bone.LOW;
        bone.digitalWrite("USR3", state);
    }
}