constant s = sq_rand(repeat(repeat(20,20),20))
integer found = 0
for i=1 to 20 do
for j=1 to 20 do
printf(1,"%d",s[i][j])
if s[i][j]=20 then
found = 1
exit
end if
printf(1,", ")
end for
printf(1,"\n")
if found then exit end if