set term pngcairo size 1024,768
# set output 'shear.png'
  set output '| ffmpeg -y -r 15 -f image2pipe -i - -vcodec libx264 -profile:v baseline -pix_fmt yuv420p shear.mp4'
  set colors classic
  set encoding utf8
  set minussign

  TimeBetSnapshot = 1.0

  unset key
  set xlabel 'x'
  set ylabel 'y'
  set yrange [0:10]
  set xtics 1
  set ytics 1 nomirror
  set y2tics 0.02
  set y2label 'v_y' offset -4,0
  set y2range [-0.12:0.12]
  set tics front
  set size ratio -1

  set palette defined (-1 'blue', 0 'white', 1 'red')
  set cbrange [-0.12:0.12]
  set format cb ''
  set cbtics 0.02 nomirror
  set colorbox user size graph .02,1 origin graph 1.10,0

  template = 'output_%03d.txt'

  n = 200
  do for [i=0:n] {
    filename=sprintf(template,i)
    print filename
    time = sprintf('t = %4.1f',i*TimeBetSnapshot)
    set title time
    plot \
      filename u 6:7:10 w p pt 7 lc palette, \
      filename u 6:10 w d lt 7 axes x1y2
  }