CGFloat BGLocations[2] = { 0.0, 1.0 };
    CGFloat BgComponents[8] = { 1.0, 1.0, 1.0 , 1.0,  // Start color
        0.9, 0.9, 0.9 , 1.0 }; // Mid color and End color
    CGColorSpaceRef BgRGBColorspace = CGColorSpaceCreateDeviceRGB();
    CGGradientRef bgRadialGradient = CGGradientCreateWithColorComponents(BgRGBColorspace, BgComponents, BGLocations, 2);


    //[UIColor colorWithRed:110/255.0 green:12/255.0 blue:15/255.0 alpha:1.0];
    CGPoint startBg = CGPointMake(_gridWidth/2,_gridHeight/2);
    CGFloat endRadius=MAX(_gridWidth/2, _gridHeight/2);

    CGContextDrawRadialGradient(ctx, bgRadialGradient, startBg, 0, startBg, endRadius, kCGGradientDrawsAfterEndLocation);

    CGColorSpaceRelease(BgRGBColorspace);
    CGGradientRelease(bgRadialGradient);