var Particle = function(position){ Collectible.call(this, position); this.type = "Higgs"; this.mass = 125; this.charge = 0; this.start_time = 1234; this.decay_time = 4444; this.target = null; this.velocity = null; this.points = 125; this.parent_type = "W"; this.decays = [{particles: ["W", "W"], probability: .3 }] }