Voting Booth Program v2.0

os.pullEvent = os.pullEventRaw
w,h = term.getSize()
modemside = "top"

function clear()
  term.clear()
end

function write(str,xpos,ypos)
  term.setCursorPos(xpos,ypos)
  term.write(str)
end

function printCenter(str,ypos)
  term.setCursorPos(w/2 - #str/2,ypos)
  term.write(str)
end

function header(str)
  printCenter(string.rep("-",w),1)
  printCenter(str,3)
  printCenter(string.rep("-",w),5)
end

function connect()
  clear()
  term.setTextColor(colors.lime)
  header("<VOTING BOOTH>")
  term.setTextColor(colors.yellow)
  printCenter("<Please click the block below this terminal.>",10)
  ev,user = os.pullEvent("player")
end
while true do
  rednet.open(modemside)
  connect()
  clear()
  rednet.broadcast("needvoter")
  sleep(.1)
  rednet.broadcast(user)
  ev,p1,p2,p3 = os.pullEvent("rednet_message")
  if p2 == "yes" then
    term.setTextColor(colors.red)
    header("<YOU CAN NOT VOTE>")
    term.setTextColor(colors.orange)
    printCenter("You have already voted "..user..".",10)
    sleep(3)
  elseif p2 == "no" then
    term.setTextColor(colors.lime)
    header("<PLACE YOUR VOTE>")
    term.setTextColor(colors.yellow)
    printCenter("Press 'a' to vote for the left option, and",10)
    printCenter("press 'b' to vote for the right option.",11)
    ev,p1,p2,p3 = os.pullEvent("char")
    if p1 == "a" then
      rednet.broadcast("vote1")
    elseif p1 == "b" then
      rednet.broadcast("vote2")
    end
    rednet.broadcast("newvoter")
    sleep(.1)
    rednet.broadcast(user)
    clear()
    term.setTextColor(colors.lime)
    header("<VOTE SENT>")
    term.setTextColor(colors.yellow)
    printCenter("Thanks for voting!",8)
    sleep(3)
  end
end