I can't live without a clock. A clock is an amazing invention because you can create your own timetable using it and you can just tell someone,who you are going to meet,what time you want to meet them, instead of describing what the sky looks like so they know what time you need them.If a clock wasn't invented then i would feel extremely tired and bored because i would have to spend most of my time on the weather forecast trying to describe to my friend or someone when they should meet me.If clocks didn't exist then Earth would be unimagineably chaotic, but fortunately Earth isn't like that and digital clocks have also helped tell the time.