-- inital start
currentBackgroundColor = "colors.gray"

function mainProcess()
    while true do
        if not fs.exists("fileData") then
            currentBackgroundColor = "colors.lime"
            term.setBackgroundColor(currentBackgroundColor)
        end
    end
end

function delData()
    while true do
        repeat
            local _, key = os.pullEvent("key")
        until key == keys.d
        term.setBackgroundColor("colors.red")
        os.sleep(.1)
        term.setBackgroundColor(currentBackgroundColor)
    end
end

parallel.waitForAll(mainProcess, delData)