作業十：缺

load dbnletters.dbn

size 200 200 2
fast
paper 100

number keycheck
{
set keyvalue 0
repeat a 1 26
{
same? 100
{
set keyvalue a
}
}
value (keyvalue)
}

set k 0
forever
{

pen (/2) (/2)

set k

letter k ((/12)*12+2) ((/12)*12+2)

notsmaller? k 26
{
set k 0
}
}