>	with(plots):

 f:=(t,P1,P2)->fieldplot([P1,P2],x=-1..1,y=-1..1,
          axes=normal,tickmarks=[0,0],
          grid=[10,10],thickness=2,color=black,
          titlefont=[TIMES,BOLD,20],
          title=`Vector field `||t,scaling=constrained):

>	f(0,2,-x);

>

>