whitelist = {
"name1",
"name2",
"name3",
"name4",
"name5",
"name6"
}
blacklist = {
"name1",
}
local function table_contains(table,element)
  for _,value in pairs(table) do
    if value == element then
      return true
    end
  end
  return false
end
while true do
    local event,player = os.pullEvent("player")
  if table_contains(whitelist,player) then
    print("Welcome: "..player.." !")
  rs.setBundledOutput("bottom",colors.orange)
    sleep(2)
    rs.setBundledOutput("bottom",colors.white)
  end
  if table_contains(blacklist,player) then
    print("no dice "..player)
  end
end