coroutine

local s = ""
os.startTimer(2)

local function command(com)
    print("'"..com.."'")
    if(com == ":quit") then
        error()
    end
end

local function clearInput()
    s = ""
    term.setCursorPos(1,5)
    term.clearLine()
    term.write(">")
end

term.clear()
term.setCursorBlink(true)
clearInput()

while true do
    event, param1, param2, param3 = os.pullEvent()

    if(event == "char") then
        s = s .. param1
        term.write(param1)
    elseif(event == "key") then
        if(param1 == keys.enter) then
            clearInput()
            command(s)
        end
    elseif(event == "timer") then
        os.startTimer(2)
    else
        print(event .. ":" .. param1 .. "," .. param2 .. "," ..param3)
    end
end