.color green
.transparency 0.0
.box 5 5 5 10 10 10
.transparency 0.25
.box 0 0 0 5 5 5
.transparency 0.5
.box -5 -5 -5 0 0 0
.transparency 0.75
.box -5 -5 -5 -10 -10 -10 
.transparency 0.9
.box -10 -10 -10 -15 -15 -15