cc dispay board

da = peripheral.wrap( "bottom" )
function board( line, text )
    da.setLine( line )
    da.print( text )
end
local function split( str, delimiter )
    local returnTable = {}
    for k, v in string.gmatch(str, "([^" .. delimiter .. "]+)" )
    do
        returnTable[#returnTable+1] = k
    end
    return returnTable
end
function clear()
    term.clear()
    term.setCursorPos(1,1)
end
clear()
while ( true )
do
    local input = io.read()
    local words = split( input, " " )
    local n = table.getn(words)
    if( n >= 1 ) then
        local line = tonumber( words[1], 10 )
        local str = ""
        if ( line ~= nill ) then
            table.remove( words, 1 )
        else
            line = 1
        end
        for k, v in pairs( words ) do
            str = str .. v .. " "
        end

        board( line, str )
        clear()
    end
end