// load spider format
load test.spi -name t

// center in middle of scene
scene center [.t]

// set center of rotation to center of dataset
.t set rcen=[.t]

// create two object at different contour levels
.t new -name c1 -set size=65,level=10
.t new -name c2 -set size=65,level=15

// color by range, using distance from rcen
.t.c1 set color=purple:yellow -range prop=dist,val=0:30,clamp
.t.c2 set color=orange:red -range prop=dist,val=10:30,clamp

// go to surface rendering, outer obj is transparent
.t.c1 render lines,t=0.3
.t.c2 render fill,t=1