grid 20 20 m e mod nul i=10 ini x=9.5 i=10 ini x=9.5 i=11 gen ratio 0.8,1 i=1,10 gen ratio 1.2,1 i=11,21 interface 1 aside from 10,1 to 10,21 bside from 11,1 to 11,21 interface 1 glued kn=1e9 ks=1e9 plot hold region grid if blue
farfocel