Your 2nd command $cmd_gif asks ImageMagick to create a picture of dimensions ( "geometry" ) 640x640 pixels, while at the same time asking for a resolution ( "density" ) of 640x640...
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.