function NightMode(canvas, spritePos, containerWidth) {
        this.spritePos = spritePos;
        this.canvas = canvas;
        this.canvasCtx = canvas.getContext('2d');
        this.xPos = containerWidth - 50;
        this.yPos = 30;
        this.currentPhase = 0;
        this.opacity = 0;
        this.containerWidth = containerWidth;
        this.stars = [];
        this.drawStars = false;
        this.placeStars();
    }
***************************************************************************

    /**
Nightmode shows a moon and stars on the horizon.