3D Array

// Array 'size' parameter.
Dim=1;

// For a consistent viewpoint, define $vpr, $vpt and $vpd.
$vpt=[13.72,8,2.65]*Dim;
$vpr=[45,0,340];
$vpd=80*Dim;

for(Idex=[0:2])
for(Jdex=[0:2])
for(Kdex=[0:2])

// Some factors for nice spacing (and size).
translate([Idex*10,Jdex*7.5,Kdex*2.5]*Dim)
// Color needs values [0:1].
color([Idex,Jdex,Kdex]/2)
linear_extrude(0.3*Dim)
text(str("[",Idex,"][",Jdex,"][",Kdex,"]"),size=Dim,font="Noto Mono");