Code Help please :)

Graphics3D 800,600,0,2
SetBuffer BackBuffer()

camera=CreateCamera()
CameraViewport camera,0,0,800,600

light=CreateLight()

col=8 : row=11 : total_cube=col*row : num=0 : spacer_cube=4 : xoffset#=24.1 : yoffset#=17.7
total_hexa=9 : spacer_hexa#=2.5

Dim cube(total_cube) 
Dim hexa(total_hexa)


x#=0 : y#=0 : depth=22
For columns = 1 To col
	For rows = 1 To row
		num=num+1
		x#=rows*spacer_cube-xoffset#
		y#=columns*spacer_cube-yoffset#
		
		cube(num)=CreateCube()
		PositionEntity cube(num),x#,y#,depth
		EntityColor cube(num),100,255,255
	Next
Next

x#=-5.5 : y#=0 : depth=8 : offset_hex=8
For hexs=1 To total_hexa
	hexa(hexs)=CreateCube()
	y#=hexs*spacer_hexa#-offset_hex
	PositionEntity hexa(hexs),x#,y#,depth
	EntityColor hexa(hexs),100,100,255
Next

speed#=.03
While Not KeyHit(1)
	For reps=1 To total_cube
		TurnEntity cube(reps),.5,1.2,1.3
	Next
	For reps=1 To total_hexa
		TurnEntity hexa(reps),0,1,0
		MoveEntity hexa(reps),0,-speed#,0
		If EntityY(hexa(reps)) <-10 Then PositionEntity hexa(reps),x#,12.5,depth
	Next
				
	RenderWorld
	
	Flip
Wend

End 

Can some one please help me a little with demo, I am in the process of making a graphic demo. It is a conversion from one of my Amiga creations way back in 1993!!! :)

I am having a little trouble in one part that I am trying to do.

I am trying to create a plane (square panel) in the background to cover the whole area so you can't see any of the black part of the screen. It is to be further in the background than the small cubes so that when I move the light source about you will see shadows from the cubes on it, everytime I use the create plane command it doesn't show on the screen?????

Any ideas please :)

Retro rulez :))