mini maze for Melt - Polarcontroller

mini maze.js

var xoff = melt.PenPosition().x, yoff = melt.PenPosition().y; 
var grid = 3;
var alto = 330, ancho = 490;

for(let i=0; i<ancho/grid; i++){
    for(let j=0; j<alto/grid; j++){
       PickOne()? LtR(i*grid, j*grid) : RtL(i*grid, j*grid);
    }
}

function PickOne(){
    return Math.floor(Math.random()*2) ? true:false;
}

function RtL(x,y){
    melt.line(x+xoff, y+yoff, x+xoff+grid, y+yoff+grid);
}

function LtR(x,y){
    melt.line(x+xoff+grid, y+yoff, x+xoff, y+yoff+grid);
}