redstoneTimer

print("How many hours?")
h = tonumber(read())
print("How many minutes?")
m = tonumber(read())
s = 0
done=false
redstone.setOutput("back", true)

function check()

    if s <= 0 then
      m = m -1
      s = 59
    end

    if m < 0 then
      h = h-1
      m = 59
    end

    if h<0 then
        done=true
    end

end


while done== false do
    term.clear()
    term.setCursorPos(1,1)
    print("Time until finish:    "..h..":"..m..":"..s)
    sleep(1)
    s = s-1
    check()
end



redstone.setOutput("back", false)
print("All done...Miner turned off")