#!/bin/bash

echo "Warming up..."

SECONDS_RUNNING=0

function floor {

local _dividend=$1

local _divisior=$2

echo $((($_dividend - ($_dividend % $_divisior )) / $_divisior))

}

function to_two_digits {

local _input=$1

printf "%02d\n" $_input

}

function get_hours {

local _seconds=$1

local _hours=$(floor $_seconds 3600)

echo $(to_two_digits $_hours)

}

function get_minutes {

local _seconds=$1

local _minutes=$(floor $_seconds 60)

local _minutes_remaining=$(($_minutes % 60))

echo $(to_two_digits $_minutes_remaining)

}

function get_seconds {

local _seconds=$1

local _minute_seconds=$(($_seconds % 60))

echo $(to_two_digits $_minute_seconds)

}

while (true)

do

sleep 1

((SECONDS_RUNNING++))

_HOURS=$(get_hours $SECONDS_RUNNING)

_MINUTES=$(get_minutes $SECONDS_RUNNING)

_SECONDS=$(get_seconds $SECONDS_RUNNING)

_OUTPUT="Timer: $_HOURS:$_MINUTES:$_SECONDS"

echo -e "\e[1A\e[K$_OUTPUT"

done;