function Rectangle(x, y, width, height) {

    this.x = x;
    this.y = y;
    this.width = width;
    this.height = height;

    this.boxColor = "red";
}

Rectangle.prototype.middle = function() { return { x: this.x + this.width * 0.5, y: this.y + this.height * 0.5 }; }

Rectangle.prototype.contains = function(point) {

    if (point.x > this.x && point.x < this.x + this.width &&
        point.y > this.y && point.y < this.y + this.height) {

            return true;
        }
    return false;
}

Rectangle.prototype.draw = function() {

    context.fillStyle = this.boxColor;
    context.fillRect(this.x,this.y,this.width,this.height);
}