Terminal Glasses Tool

lights = false
door = false
Help = false
show = true
local p = peripheral.wrap("top")
local bgcol = 0xFF0000
local txtcol = 0x00FFFF

function error(msg)
p.clear()
mybox = p.addBox(1,1, 100, 50, bgcol, 0.5)
local w = mybox.getX()
mytext = p.addText(50, 10, tostring(msg), txtcol)
end

function help()
p.clear()
p.clear()
mybox = p.addBox(1,1, 120, 150, bgcol, 0.5)
mytext = p.addText(1, 10, "Help", txtcol)
mytext = p.addText(1, 20, "Shows or hides the help", txtcol)
mytext = p.addText(1, 40, "=1+1", txtcol)
mytext = p.addText(1, 50, "Shows what 1+1 is,", txtcol)
mytext = p.addText(1, 60, "Works with any number", txtcol)
mytext = p.addText(1, 70, "and operator", txtcol)
mytext = p.addText(1, 90, "Hide / Show", txtcol)
mytext = p.addText(1, 100, "Hides or shows the", txtcol)
mytext = p.addText(1, 110, "overlay", txtcol)
end

function start()
p.clear()
mybox = p.addBox(1,1, 100, 50, bgcol, 0.5)
mytext = p.addText(1, 1, "Version: 1.0", txtcol)
mytext = p.addText(1, 20, "Try $$help", txtcol)
end

start()

while true do
_, p1 = os.pullEvent("chat_command")
 if p1 == "help" then
 if show then
  if Help then
  Help = false
  start()
 else
 Help = true
 help()
 end
 end
 if string.find(p1, "=") then
 if show then
 txt = (tostring(p1):match("=(.+)"))
 num = loadstring("return "..txt)()
  mytext = p.addText(1, 40, tostring(num), textcol)
 sleep(5)
 start()
  end
  end
 if string.find(p1, "reverse ") then
   if show then
     txt = tostring(p1):match("reverse(.+)")
     num = string.reverse(txt)
     mytext = p.addText(1, 40, tostring(num), txtcol)
     sleep(5)
     start()

   end
 end
  elseif p1 == "hide" then
  if show then
  p.clear()
  show = false
  end
  elseif p1 == "show" then
  if not show then
  show = true
  start()
  end
else
if show then
    error("Error!")
    sleep(1)
    start()
  end
 end
end