DE explorer maple

with(DETools):
Explore(DEplot({diff(x1(t), t) = a*x1(t)+b*x2(t), diff(x2(t), t) = c*x1(t)+d*x2(t)}, [x1(t), x2(t)], t = -1 .. 1.0, x1 = -5 .. 5, x2 = -5 .. 5, [[x1(0) = u, x2(0) = v]], arrows = curve), parameters = [[u = -5.0 .. 5.0], [v = -5.0 .. 5.0], [a = -4.0 .. 4.0], [b = -4.0 .. 4.0], [c = -4.0 .. 4.0], [d = -4.0 .. 4.0]], placement = left);