set terminal png
set output ofilename
set timefmt "%d:%H:%M:%S"
set format x "%M:%S"
set xdata time
set xlabel "Time (M:S)"
set ylabel "Latency (ms)"
set style data lines
plot ifilename every ::2 using 1:2 t '%50', '' every ::2 using 1:3 t '%75', '' every ::2 using 1:4 t '%95', '' every ::2 using 1:5 t '%99'
