function Vehicle(x, y, id, dis) {

  this.id = id

  this.pos = createVector(x, y)

}

​

Vehicle.prototype.update = function(dis) {

  this.r = this.dis2r(dis)

  if (this.r >= 13) {

    this.r = 12

  }

}

​

Vehicle.prototype.show = function() {

  var b = map(mouseX, 0, 800, 117, 116)

​

  stroke(mouseX, mouseY, 117, 200);

  strokeWeight(this.r)

  point(this.pos.x, this.pos.y)

}

​

Vehicle.prototype.dis2r = function( dis ){

  return dis / 12

}