--Screen/Drawing functions
-----------------------------
w,h = term.getSize()
hW = w/2
hH = h/2

function centerPrint(y,text)
  term.setCursorPos(w/2 - #text/2, y)
    term.write(text)
end

function drawAt(x,y,text)
 term.setCursorPos(x,y)
write(text)
end

function cleanScreen()
term.clear()
  term.setCursorPos(1,1)
 end


input = 1


function drawArt()

c = colors.combine(colors.red,colors.black,colors.white,colors.green)
white = false
black = false
green = false
red   = false
rs.setBundledOutput("back", c)

  cleanScreen()
  term.setTextColor(colors.lime)
  term.setBackgroundColor(colors.black) --title and title background color
  print[[

      VAULT-TEC REACTOR MK 4 CONTROL STATION
          AUTHORIZED PERSONEL  ONLY!

]]


 for i = 5,19 do
 term.setBackgroundColor(colors.black) -- MAIN BACKGROUND SPAM COLOR
  drawAt(1,i,"                                                   ")
   term.setBackgroundColor(colors.black)
  end

  if input == nil then
  input = 1
  end

  if input == 1 then
  selected =  "[1] ACTIVATE    REACTORS 1 - 3 "

  elseif input == 2 then
  selected = " [2] DEACTIVATE  REACTORS 1 - 3 "

  elseif input == 3 then
  selected = " [3] ACTIVATE    REACTORS 4 - 6 "

  elseif input == 4 then
  selected = " [4] DEACTIVATE  REACTORS 4 - 6 "

  elseif input == 5 then
  selected = " [5] ACTIVATE    BREEDER CORE 1 "

  elseif input == 6 then
  selected = " [6] DEACTIVATE  BREEDER CORE 1 "

  elseif input == 7 then
  selected = " [7] ACTIVATE    BREEDER CORE 2 "

  elseif input == 8 then
  selected = " [8] DEACTIVATE  BREEDER CORE 2 "

  elseif input == 9 then
  selected = " [0] -EMERGENCY-  CORE SHUTDOWN "
  end

 term.setBackgroundColor(colors.black)    --selection cover
  drawAt(7,13,"                                                   ")

  term.setBackgroundColor(colors.black) -- menu section background
  term.setTextColor(colors.lime) -- menu section text
   centerPrint(17,selected) --center text?
    term.setBackgroundColor(colors.black)




  options = {
"                                ",
" [1] ACTIVATE    REACTORS 1 - 3",
" [2] DEACTIVATE  REACTORS 1 - 3 ",
" [3] ACTIVATE    REACTORS 4 - 6",
" [4] DEACTIVATE  REACTORS 4 - 6 ",
" [5] ACTIVATE    BREEDER CORE 1",
" [6] DEACTIVATE  BREEDER CORE 1 ",
" [7] ACTIVATE    BREEDER CORE 2",
" [8] DEACTIVATE  BREEDER CORE 2 ",
" [0] -EMERGENCY-  CORE SHUTDOWN ",
"                                ",
}


for i = 1, #options do
term.setBackgroundColor(colors.black) -- options background color
term.setTextColor(colors.blue) -- options text color
  drawAt(10,i + 4,options[i])
 end

 term.setTextColor(colors.red) -- option text color optional
 drawAt(10,14," [0] -EMERGENCY-  CORE SHUTDOWN")
end




   function events()
   evt, but = os.pullEvent()
     if evt == "key" then

 if but == 208 then --down arrow
 input = input + 1
 if input > 9 then
 input = 9
 end

 elseif but == 200 then --up arrow
 input = input - 1
 if input < 1 then
 input = 1
 end

 elseif but == 28 then --Enter
 if input == 1 then
  c = colors.subtract(c, colors.white)
  rs.setBundledOutput("back",c)
  white = not white


  elseif input == 2 then
  c = colors.combine(c, colors.white)
  rs.setBundledOutput("back",c)
  white = not white


  elseif input == 3 then
  c = colors.subtract(c, colors.black)
  rs.setBundledOutput("back",c)
  black = not black


  elseif input == 4 then
  c = colors.combine(c, colors.black)
  rs.setBundledOutput("back",c)
  black = not black


  elseif input == 5 then
  c = colors.subtract(c, colors.red)
  rs.setBundledOutput("back",c)
  red = not red


  elseif input == 6 then
  c = colors.combine(c, colors.red)
  rs.setBundledOutput("back",c)
  red = not red


  elseif input == 7 then
  c = colors.subtract(c, colors.green)
  rs.setBundledOutput("back",c)
  green = not green


  elseif input == 8 then
  c = colors.combine(c, colors.green)
  rs.setBundledOutput("back", c)
  green = not green


  elseif input == 0 then
  c = colors.combine(colors.green,colors.red,colors.white,colors.black)
  green = false
  red = false
  black = false
  white = false
  rs.setBundledOutput("back", c)
  end

end
   end
     end

 function main()
    while true do
      cleanScreen()
       drawArt()
     events() --Handles the menu stuff
 end
    end


main()