Gnuplot：如何在暂停后绘制文件中的每一行

i have a 3 column datafile and i wanted to use splot to plot the same. But what i want is that gnuplot plots first row (in some colour, say red) and then pauses for say 0.3 secs and then moves on to plotting next row (in other colour, not in red, say in green), pauses for 0.3 secs and then proceeds to next row....so on n so forth.i have a 3 column datafile and i wanted to use