ComputerCraft - Mob Killer Turtle

print("Press Q to quit")

local timer = os.startTimer(1)

while true do
    local event, a = os.pullEvent()

    if event == "timer" then
        if a == timer then
            turtle.attack()
            timer = os.startTimer(1)
        end
    elseif event == "char" then
        if a == "q" then
            return
        end
    end
end