local function handleInput()
    --Handle CTRL keys.
    if(keyboard.isControlDown) then
        --Exit
        if(keyboard.isKeyDown(keyboard.keys.c)) then
            term.clear()
            running = false
        end
    else
        --Go up
        if(keyboard.isKeyDown(keyboard.keys.w)) then
            if not (selected == 1) then
                selected = selected - 1
            end
            refresh()
        --Go down
        elseif (keyboard.isKeyDown(keyboard.keys.s)) then
            if not (selected == getMachineListSize()) then
                selected = selected + 1
            end
            refresh()
        end
    end
end

while running do
    handleInput()
end