# Exercises These exercises will reinforce your knowledge of manipulating arrays. You will prove yourself that you can write easy to maintain Go programs. 1. **[Refactor](https://github.com/inancgumus/learngo/tree/master/15-project-retro-led-clock/exercises/01-refactor)** In this exercise, you will refactor the project to multiple files by moving all the placeholders. This will make the project easy to maintain down the road. 2. **[Set an Alarm](https://github.com/inancgumus/learngo/tree/master/15-project-retro-led-clock/exercises/02-alarm)** You will print " ALARM! " every 10 seconds. 3. **[Split Second](https://github.com/inancgumus/learngo/tree/master/15-project-retro-led-clock/exercises/03-split-second)** You will display the split second in the clock, you will need to update the clock every 1/10th of a second instead of every second. 4. **[Ticker](https://github.com/inancgumus/learngo/tree/master/15-project-retro-led-clock/exercises/04-ticker)** This is a HARD EXERCISE. You will slide the clock animation from right-to-left. After this exercise, you will truly feel that you've mastered everything you've learned so far.