http://hitode909.hatenablog.com/entry/2015/09/13/205925 I wrote @hitode909's 集中線GIFメーカー(Awesome Web application) in Golang. This is command line application and you can use this as below. Repository https://github.com/syohex/speedline Sample Output Code package main import ( "flag" "fmt" "math" "math/rand" "github.com/gographics/imagick/imagick" ) var ( output = flag.String("o", "output.gif", "out