class Lives {
    constructor(ctx) {
        this.ctx = ctx;
        this.reset();

        this.ctx.font = "30px Consolas";
        let m = ctx.measureText('Score: 00000');
        this.x = ctx.canvas.width - m.width;
        this.y = 20;
    }
    reset() {
        this.lives = 3;
    }
    lost() {
        this.lives--;
        return this.lives==0;
    }
    update() {
        if (this.y != 60) this.y++;
        if (this.y > 0) {
            let txt = (String.fromCharCode(parseInt('26A1', 16))+" ").repeat(this.lives);

            this.ctx.font = "30px Consolas";
            this.ctx.fillStyle = 'Green';
            this.ctx.fillText(txt, this.x, this.y);
        }
    }
}