RC Turtle Master

os.pullEvent = os.pullEventRaw
shell.run("label set RCTurtleMaster")
print("You need to shift right click the top of the computer with a wireless modem!")
rednet.open("top")
term.clear()
print("Remote Control Turtle Master")
print("Type ? for possible commands")
while 1<2 do
 write("Cmd: ")
 a = read()
 if a == "?" then
  term.clear()
  term.setCursorPos(1,1)
  print("? - get commands")
  read()
  print("dig - dig the block in front of the turtle")
  read()
  print("forward[number] -  move the turtle [number] blocks forward, destroying blocks if they are in the path")
  read()
  print("up[number] -  move the turtle [number] blocks up, destroying blocks if they are in the path")
  read()
  print("down[number] -  move the turtle [number] blocks down, destroying blocks if they are in the path")
  read()
  print("back[number] -  move the turtle [number] blocks backwards")
  read()
  print("drop - drop all items in the selected slot in front, will put in chest/turtle if it is infront")
  read()
  print("dropup - drop all items in the selected slot above, will put in chest/turtle if it is above")
  read()
  print("dropdown - drop all items in the selected slot below, will put in chest/turtle if it is below")
  read()
  print("select[number] - select slot [number]. Only use numbers 1-16, or it may crash all the turtles")
  read()
  print("empty - drop all items in all slots in front, will put in chest/turtle if it is infront")
  read()
  print("emptyup - drop all items in all slots above, will put in chest/turtle if it is above")
  read()
  print("emptydown - drop all items in all slots below, will put in chest/turtle if it is below")
  read()
  print("ud - update this computer and the turtles")
  read()
  print("ping - find out how many turtles are listening to this computer")
  read()
  term.clear()
  term.setCursorPos(1,1)
 elseif a == "ud" then
  rednet.broadcast("ud")
  print("Will now update...")
  sleep(0.4)
  shell.run("pastebin get HVArpJ7c ud")
  shell.run("ud")
 elseif a == "ping" then
  print("Sending ping...")
  rednet.broadcast("ping")
  print("Awaiting reposes...")
  done = false
  tt = 0
  print("---------------------------------------")
  while done == false do
   p3 = "N/A"
   p1, p2 = rednet.receive(1)
   if p1 == nil then
    done = true
   else
    print("Found turtle! P1: "..p1.." P2: "..p2.." P3: "..p3)
    tt = tt + 1
   end
  end
  print("----------------------------------------")
  print("Total turtles found: "..tt)

 else
  rednet.broadcast(a)
 end
end