Sarcastic_Bannanas Menu Code

local w,h = term.getSize()
local running = true
local doors = false
local lights = false
local cooling = false
local i = 1

function printCentred( y, s )
    local x = math.floor((w - string.len(s)) / 2)
    term.setCursorPos(x,y)
    term.clearLine()
    term.write( s )
end

local nOption = 1

-- Display menu
local function drawMenu()
    term.clear()
    term.setCursorPos(1,1)
    term.write( "REACTOR ACCESS TERMINAL" )

    term.setCursorPos(w-25,1)
    if nOption == 1 then
        if door == false then do
        term.write("OPEN REACTOR DOOR")
        end
        else do term.write("CLOSE REACTOR DOOR")
        end
        end
    elseif nOption == 2 then
        if lights == false then do
        term.write("TURN LIGHTS ON")
        end
        else do term.write("TURN LIGHTS OFF")
        end
        end
    elseif nOption == 3 then
        if cooling == false then do
        term.write("TURN COOLING OFF")
        end
        else do term.write("TURN COOLING ON")
        end
        end
    else
        term.write("Console")
    end

end

-- Display the frontend
term.clear()
local function drawFrontend()
    printCentred( math.floor(h/2) - 3, "" )
    printCentred( math.floor(h/2) - 2, "AVALIABLE COMMANDS" )
    printCentred( math.floor(h/2) - 1, "" )
        if doors == false then do
            printCentred( math.floor(h/2) + 0, ((nOption == 1) and "[ OPEN REACTOR DOOR ]") or "OPEN REACTOR DOOR" )
        end

    elseif doors == true then do
            printCentred( math.floor(h/2) + 0, ((nOption == 1) and "[ SEAL REACTOR DOOR ]") or "SEAL REACTOR DOOR" )
        end
    else
        end

        if lights == false then do
            printCentred( math.floor(h/2) + 1, ((nOption == 2) and "[ TURN LIGHTS ON ]") or "TURN LIGHTS ON" )
        end

    elseif lights == true then do
            printCentred( math.floor(h/2) + 1, ((nOption == 2) and "[ TURN LIGHTS OFF ]") or "TURN LIGHTS OFF" )
        end
    else
        end

    if cooling == false then do
            printCentred( math.floor(h/2) + 2, ((nOption == 3) and "[ DEACTIVATE COOLING ]") or "DEACTIVATE COOLING" )
        end

    elseif cooling == true then do
            printCentred( math.floor(h/2) + 2, ((nOption == 3) and "[ ACTIVATE COOLING ]") or "ACTIVATE COOLING" )
        end
        else
        end

    printCentred( math.floor(h/2) + 3, ((nOption == 4) and "[ CONSOLE ]") or "CONSOLE" )
end




-- Call functions for display menu

while i == 1 do

drawMenu()
drawFrontend()

while true do
    local e,p = os.pullEvent()
    if e == "key" then
        local key = p
        if key == 17 or key == 200 then
            -- Up
            if nOption > 1 then
                nOption = nOption - 1
                drawMenu()
                drawFrontend()
            end
        elseif key == 31 or key == 208 then
            -- Down
            if nOption < 4 then -- Change 3 by the number of option.
                nOption = nOption + 1
                drawMenu()
                drawFrontend()
            end
        elseif key == 28 then
            -- Enter
            break
        end
    end
end

-- Conditions
if nOption == 1 then
    if doors == true then do
    doors = false
    rednet.send(39,"rdo1")
    end
    end
    if doors == false then do
    doors = true
    rednet.send(39,"rdo0")
    end
    end


elseif nOption == 2 then
    if lights == true then do
    lights = false
    --rednet.send(39,"l1")
    end
    end
    if lights == false then do
    lights = true
    --rednet.send(39,"l0")
    end
    end

elseif nOption == 3 then
    if cooling == true then do
    cooling = false
    --rednet.send(39,"c0")
    end
    end
    if cooling == false then do
    cooling = true
    --rednet.send(39,"c1")
    end
    end

elseif nOption == 4 then
    running = false
    term.clear()
    term.setCursorPos(1, 1)
    break end

end