set terminal png
set output "bench-balls.png"
set xlabel "Ball count"
set ylabel "Time (ms)"
set pointsize 0.3
plot "bench-interactions" notitle with points, \
     "bench-interactions" smooth bezier title "Interactions" with lines, \
     "bench-nointer" notitle with points, \
     "bench-nointer" smooth bezier title "No interactions" with lines
replot