I want to use the bgshade command to draw shadows, but I didn't succeed. I don't know where the problem is?
Looking forward to your help, thank you
data as follows:


Code:
* Example generated by -dataex-. For more info, type help dataex
clear
input float months byte var1 int var2 double var3
720 12 107 7.49
721  5  62  4.5
722 11  42 4.12
723 10  41 4.54
724  4  38 4.27
725  5  38 4.53
726  5  45 4.07
727 11  38 3.92
728  2  31 3.71
729  9  60 5.45
730  5  50 4.65
731  3  51 4.88
732 12 107 7.49
733  5  62  4.5
734 11  42 4.12
735 10  41 4.54
736  4  38 4.27
737  5  38 4.53
738  5  45 4.07
739 11  38 3.92
740  2  31 3.71
741  9  60 5.45
742  5  50 4.65
743  3  51 4.88
708 12 107 7.49
709  5  62  4.5
710 11  42 4.12
711 10  41 4.54
712  4  38 4.27
713  5  38 4.53
714  5  45 4.07
715 11  38 3.92
716  2  31 3.71
717  9  60 5.45
718  5  50 4.65
719  3  51 4.88
end
format %tm months
my code as follows:

bgshade months, ///
legend shaders(month) ///
twoway(line var2 months, ///
sort title("var2") lcolor(blue*1.2)) // but it doesn't work

Question 1: I want to know where is the problem and the correct codes, thank you

Question 2: but for pannel data, the command bgshade can
The following example (https://www.lianxh.cn/news/b89fd3c601e31.html) shows that time series data is okay, but I want to know whether the bgshade command can still draw a shadow map for panel data?