I have seen variations of this tutorial more than a hundred times, it was about time I did it myself. I love chevron and I had a hideous creme carpet in desperate need of restyling. I took the half-priced textile paint as a sign to get some work done.
Since the accents in our new apartment are red (not my idea but oh well... I am working with what I have) I chose Karmin red textile paint. If you want to do this project you will also need a big heavy brush (I used number 20 but I suggest you go for a bigger one) and some thick duct tape. You might use paper stencils, but it will be more difficult, because they wouldn't stick to the carpet as duct tape will and you might lose the crisp line. Oh, and you will also need an ugly carpet. Or a boring one. Or one that you're already tired of.
If you seek perfection and absolute symmetry, I recommend you use a ruler for making the pattern. I did it by hand, (partially because there was not a single ruler at home) and it works well too - you will just need some extra time.
Painting on textile is not like painting on paper or canvas. The paint soaks in quickly and you have little time to spread it. You might want to have that in mind when planning how much paint you will be needing.
Textile paint dries quickly, so by the time you're painting the last line, the first ones you've done will be already dry. You can gently remove the duct tape and see if there are any imperfections that can be corrected.
And there you have it, the boring carpet is not that boring anymore. It's even cute. And a great conversation starter, too! When some nice people come to your place for a cup of black tea with milk and honey (because I make the best tea latte around!) and say "Hey, how are you, how have you been?", you can say "See the carpet over there? I decorated it!".