gen zone brick size 1 1 2 rat 1 1 1 &
p0 0 0 0 p1 0.1 0 0 p2 0 0.05 0 p3 0 0 0.2
gen zone brick size 1 1 2 rat 1 1 1 &
p0 -0.2 0.05 0 p1 -0.1 0.05 0 p2 -0.2 0.1 0 p3 -0.2 0.05 0.2
int 1 fa ra y 0.05 z 0 0.1
group haut range y 0.05 0.1
ini x add 0.2 ra gr haut