Is there a reason why you use \externalfigure because the width can be set with \scale, e.g.25. Mai 2016 um 19:09For educational purposes I try to simulate a ammeter for reading practice.I would like create six or more ammeter with different readings, but i'm not able to do that because metapost create the same random number every time I call the buffer that defines my ammeter.How can I fix that?