It was the year 2000, when IE was considered awesome. The internet then was slow and expensive and I had a quota about half an hour a day for dial up.

I discovered that I could view the source code of any page and while it looked rather cryptic I slowly started to understand how it worked. After months of tinkering in Notepad, I was able to write some html and JavaScript. No books, no online tutorials, just pure act of curiosity and a sense of adventure.

How to write JavaScript properly had to wait for another decade after an engineering degree, a dozen other languages, and new browser. But those tinkering days were what got me into coding.

!rant

How does everyone here like their coffee?
For every cup I drink, it should be espresso (0.35 litres) with three cubes 'o sugar and a little shot of milk.

A 2d simulation of the mars rover curiosity and its commandControl station. Pure java. The two components talk to each other via apache-kafka. Rover has its own operating system (kernel) and resource management. Hooked up some sensors to NASA API.

!rant

Buy some colored pens. The more colors the better.

I did it out of curiosity. Ended up being a life saver when taking notes and planning work on paper. It probably cut my work in half. I spend more time writing stuff on paper and planning stuff, but when I do write 10 lines of code, they turn out to be pure gems fitting perfectly in the entire structure. I write them with tons of confidence, knowing that I had thought of everything and I didn't forget anything, because everything is right there, in color, on the diagrams that I drew.

Very Long, random and pretentiously philosphical, beware:

Imagine you have an all-powerful computer, a lot of spare time and infinite curiosity.
You decide to develop an evolutionary simulation, out of pure interest and to see where things will go. You start writing your foundation, basic rules for your own "universe" which each and every thing of this simulation has to obey. You implement all kinds of object, with different attributes and behaviour, but without any clear goal. To make things more interesting you give this newly created world a spoonful of coincidence, which can randomely alter objects at any given time, at least to some degree. To speed things up you tell some of these objects to form bonds and define an end goal for these bonds:
Make as many copies of yourself as possible.
Unlike the normal objects, these bonds now have purpose and can actively use and alter their enviroment. Since these bonds can change randomely, their variety is kept high enough to not end in a single type multiplying endlessly. After setting up all these rules, you hit run, sit back in your comfy chair and watch.
You see your creation struggle, a lot of the formed bonds die and desintegrate into their individual parts. Others seem to do fine. They adapt to the rules imposed on them by your universe, they consume the inanimate objects around them, as well as the leftovers of bonds which didn't make it. They grow, split and create dublicates of themselves. Content, you watch your simulation develop. Everything seems stable for now, your newly created life won't collapse anytime soon, so you speed up the time and get yourself a cup of coffee.
A few minutes later you check back in and are happy with the results. The bonds are thriving, much more active than before and some of them even joined together, creating even larger bonds. These new bonds, let's just call them animals (because that's obviously where we're going), consist of multiple different types of bonds, sometimes even dozens, which work together, help each other and seem to grow as a whole. Intrigued what will happen in the future, you speed the simulation up again and binge-watch the entire Lord of the Rings trilogy.
Nine hours passed and your world became a truly mesmerizing place. The animals grew to an insane size, consisting of millions and billions of bonds, their original makeup became opaque and confusing. Apparently the rules you set up for this universe encourage working together more than fighting each other, although fights between animals do happen.
The initial tools you created to observe this world are no longer sufficiant to study the inner workings of these animals. They have become a blackbox to you, but that's not a problem; One of the species has caught your attention. They behave unlike any other animal. While most of the species adapt their behaviour to fit their enviroment, or travel to another enviroment which fits their behaviour, these special animals started to alter the existing enviroment to help their survival. They even began to use other animals in such a way that benefits themselves, which was different from the usual bonds, since this newly created symbiosis was not permanent. You watch these strange, yet fascinating animals develop, without even changing the general composition of their bonds, and are amazed at the complexity of the changes they made to their enviroment and their behaviour towards each other.
As you observe them build unique structures to protect them from their enviroment and listen to their complex way of communication (at least compared to other animals in your simulation), you start to wonder:
This might be a pretty basic simulation, these "animals" are nothing more than a few blobs on a screen, obeying to their programming and sometimes getting lucky. All this complexity you created is actually nothing compared to a single insect in the real world, but at what point do you draw the line? At what point does a program become an organism?
At what point is it morally wrong to pull the plug?