{

            let STEP_Y = 12,
                TOP_MARGIN = STEP_Y * 4,
                LEFT_MARGIN = 35,
                i = context.canvas.height;

            context.save();

            context.strokeStyle = 'lightgray';
            context.lineWidth = 0.5;

            while (i > TOP_MARGIN) { // Draw horizontal lines from bottom up
                context.beginPath();
                context.moveTo(0, i);
                context.lineTo(context.canvas.width, i);
                context.stroke();
    