Bank Client

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

function drawlist(title, list, num)
    clear()
    term.setTextColor(colors.lime)
    print(title.."\n")
    for i,v in pairs(list) do
        if i == num then
            term.setTextColor(colors.white)
            write("[")
            term.setTextColor(colors.lime)
            write("-")
            term.setTextColor(colors.white)
            write("]")
            term.setTextColor(colors.lime)
            print(" "..v)
        else
            term.setTextColor(colors.white)
            print("[ ] "..v)
        end
    end
end

function getKey()
    local rt = nil
    function lop()
        local e, a1 = os.pullEvent("key")
        if a1 == 200 then
            rt = "up"
        elseif a1 == 208 then
            rt = "down"
        elseif a1 == 28 then
            rt = "enter"
        else
            lop()
        end
    end
    lop()
    repeat sleep(0) until rt ~= nil
    return rt
end

function ch(title, list)
    clear()
    local ind = 1
    drawlist(title, list, ind)
    local rt = nil
    cycle = function()
        local ke = getKey()
        if ke == "up" then
            if ind > 1 then
                ind = ind - 1
            else
                ind = #list
            end
            drawlist(title, list, ind)
            cycle()
        elseif ke == "down" then
            if ind < #list then
                ind = ind + 1
            else
                ind = 1
            end
            drawlist(title, list, ind)
            cycle()
        elseif ke == "enter" then
            rt = ind
        end
    end
    cycle()
    repeat sleep(0) until rt ~= nil
    return ind
end

function main()
    local lts = ch("Main menu", {"Login", "Create account", "Pay user", "Check money"})
    if lts == 1 then
        clear()
        term.setTextColor(colors.lime)
        print("Login:\n")
        term.setTextColor(colors.white)
        write("Username: ")
        term.setTextColor(colors.lime)
        local user = tostring(read())
        term.setTextColor(colors.white)
        write("Password: ")
        term.setTextColor(colors.lime)
        local pass = tostring(read("*"))
        term.setTextColor(colors.white)
        clear()
    elseif lts == 2 then
        clear()
        term.setTextColor(colors.lime)
        print("Create account:\n")
        term.setTextColor(colors.white)
        write("Username: ")
        term.setTextColor(colors.lime)
        local user = tostring(read())
        term.setTextColor(colors.white)
        write("Password: ")
        term.setTextColor(colors.lime)
        local pass = tostring(read("*"))
        term.setTextColor(colors.white)
        write("Confirm password: ")
        term.setTextColor(colors.lime)
        local pass2 = tostring(read("*"))
        term.setTextColor(colors.white)
        if pass == pass2 then
        end
        clear()
    end
end

main()