set parametric
set hidden
set isosamples 50,50
set title "Tore"
set urange [0:2*pi]
set vrange [0:2*pi]
set view 60,30,1
set terminal png small color
set output "tore.png"
splot (1-0.2*cos(v))*cos(u),(1-0.2*cos(v))*sin(u),0.2*sin(v)
quit