How can I display 2 followed by 1 single animation?

ie

a:=animate(...)
b:=animate(...)
c:=animate(...)

I can animate all 3 in sequence with display((a,b,c),insequence=true)  or I can animate them all at once.  But how can I animate two at once followed by the 3rd animation?

I tried

h:=display(a,b)
g:=display(c)

gg:=dispaly((h,g),insequence=true)    Which I thought might have worked however that produces multiple frames.

Can the seq here be made into an equivalent for command?

x:=[6,2,8,4]
y:=[7,5,1,3]
stepsize:=0.5
step:=seq(min(x)..max(x),stepsize)

b:=[seq([new,min(y)],new=step)]
pointplot(b,symbol=circle,color=blue)

This is code I've converted from Matlab.  Now I'm attempting to convert the seq here into a similar but simple for loop without using seq.  There is a similar code line in Matlab using a for loop but I have no experience with...

Another pointplot3d animate problem

when the axes option is not specified the view option magnifies the symbols when symbol=circle
The field of view is not increased as it should.

animate(pointplot3d, [[[1, 2, 3], [4, 5, 6], [2, 2, 2]], color = blue, symbol=circle, orientation = [A, A]], A = 45 .. 405, view = [-100 .. 100, -100 .. 100, -100 .. 100], frames = 100);

 This is in Maple 12, I haven't checked to see if it exists in newer versions of Maple. 

This doesn't seem to work in Maple 13 and 14.  However it works in Maple 12.
All I get is a static animation plot.

with(plots):
animate(pointplot3d,[[[1,2,3],[4,5,3],[2,2,2]],color=blue,orientation=[45,A]],A=45..315);

What am I doing wrong?

There's a bug when using colorstyle=HUE.  Maple isn't displaying the proper number color values.

restart;
with(plots):

a:=Matrix(1..4,1..4,rand(1..4)):

listdensityplot(a)

listdensityplot(a,colorstyle=HUE)

The colorstyle=HUE only shows 3 colors (value 1 = value 4) but it seems ok in the greyscale plot (4 different values, 4 different shades).  Seems to me like the HUE scale is n-1 number of values short. 

Looks like a bug?