plot [] [-1.2:1.2] 'four-sq.out' using 2 with lines
replot 'four-sq.out' using 3 with lines
replot 'four-sq.out' using 4 with lines
replot 'four-sq.out' using 5 with lines
replot 'four-sq.out' using 6 with lines
replot 'four-sq.out' using 7 with lines
pause -1