const DOWN = 1;

const _LEFT = 2;

const _RIGHT = 3;

​

function setup() {

  createCanvas(400, 400);

  const object1 = {

    UP: [],

    DOWN: [],

    LEFT: [],

    RIGHT: []

  }

  const object2 = {

    [UP]: [],

    [DOWN]: [],

    [_LEFT]: [],

    [_RIGHT]: []

  }

  console.log(object1)

  console.log(object2)

}

​