quarry_measure_time

function writeToFile(fileName, data)
        local f = fs.open(fileName, "w")
        f.write(data)
        f.close()
end

local state=false

local txt=""

while true do
    local s=redstone.getInput("back")
    if s~=state then
        state=s
        local t
        if s then
            t="on:"..os.clock()
        else
            t="off:"..os.clock()
        end
        print(t)
        txt=txt..t.."\n"
        writeToFile("measuringResult",txt)


    end
    sleep(1)

end